FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
COMPLETE SPECIFICATION
(Section 10, rule 13)
PHACO TIP FOR/ANDPHACOEMULSIFICATION TECHNIQUE
Shri Gajanan Invention and Advanced Research Centre,
with our office at SSGM College of Engineering, Shegaon,
AT Post: Shegaon, Dist: Buldhana, 444 203,
Maharashtra, India.
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF INVENTION:
This invention relates to an instrument / equipment for use in eye surgery.
In particular, this invention relates to an instrument / equipment and/or part thereof, useful in cataract extraction.
Further, this invention relates to an instrument / equipment and/or part thereof for eye surgery of cataract extraction based on ultrasonic power.
Still further, this invention relates to an instrument / equipment and/or part thereof for use in Phaco Emulsification Surgery of cataract extraction based on ultrasonic power,
BACKGROUND AND PRIOR ART
Medical science has progressed worldwide. The surgery has become very easier with kind of advancement that has been shown over a decade or two. Every day improvement in technology with newer instruments / equipments or parts thereof is reducing the burden on the surgeons / doctors improving their life so also of the patients. Patients hence can lead normal life faster within short period of time performing normal routine without the need of help.
A technique that involves laser is localized avoiding the healing problems and need more time with severe blood loss while performing the surgery.
Eye is a delicate organ and impairment of this organ hampers the life totally. Couple of years ago an eye operation required longer time but today the scenario is very different biomedical engineering has brought in improvement in sophistication of the equipments /

instruments. Long hours of struggle of surgeons and patients is minimized and also the complications. Cataract is the most common cause of blindness and surgery is the only option.
Various techniques have come up in medical field varying from improvement and/or development in the kind of surgery / techniques which make use of improved / newer kind of equipments / instruments. Even a design of an instrument or part thereof is modified as per the need of the surgeon. Such modernization and sophistication improved surgeries of even difficult and delicate kind relieving burden of surgeons decreasing level of complications during and after surgery improving chances of success to near 100% and also the efficiency of a surgeon to perform number of surgeries / operations per day improved. Sophistication in instrumentation and techniques has not only taken care of excess blood loss during operation with small or precise incision with finer equipments / instruments or parts thereof reducing the problems associated with it but also improved upon the healing process.
Phacoemulsification cataract surgery uses an ultrasonic device to break up and 'then remove a cloudy lens, or cataract, from the eye to improve vision. Usually the insertion of an intraocular lens (IOL) is immediately followed by phacoemulsification.
Earlier method of extraction involved a longer incision, about 0.4 in (10 mm), or almost half of the eye, the time taken for recovery was a week or more and operated individual / patient physically handicapped during this time period.

Advances in technology brought in surgery with smaller incision especially with introduction of phacoemulsification technique simplified the extraction of cataract wherein the incision reduced from larger to smaller, reducing pain and shorter recovery time. A cataract is broken up or emulsified, into small pieces using an ultrasound tip. The procedure involves making of an incision in cornea, the outer covering of the eye.
The Phaco Emulsification surgery is in use since 1960 and is based on ultrasonic power that is produced by ultrasonic hand piece of Phaco machine. Energy produced by hand piece is transmitted onto a needle, the Phaco Tip. Phaco tip needle, may be sleeved or sleeveless, if of Titanium, chromium and similar kind with sleeve or sleeveless and Teflon or rubber sleeve for good grip / hold are in use.
Earlier method of extracapsular extraction involved a longer incision which was about 0.4 in (10 mm), or almost covering half of the eye or intracapsular cataract extraction wherein incision is larger with a greater risk of retina detachment and swelling. Therefore, recovery period is longer with limited physical activity for weeks and /or months.
There are two types of techniques for cataract phacoemulsification surgeries. These are coaxial and biaxial wherein:
• coaxial, uses a sleeved phaco tip to break the cataract into fragments and then aspirate it, and

• biaxial, uses the phaco tip to emulsify and aspirate the cataract and a separate irrigating chopper to avoid anterior chamber collapse.
The Phaco Emulsification is initiated by making an incision behind the eye ball or temporal region of eye ball or preferred safer incision is temporal location which is variable depending on the size and denseness of cataract followed by injecting a viscoelastic fluid like short-chain hyaluronic acid to reduce shock on the intraocular tissue. A circular incision is then made in the membrane surrounding the cataract (capsulohexis) and a small Titanium needle or Titanium phaco tip is inserted in the cornea. Ultrasound waves / frequencies from phaco tip fragment layers of cataract / emulsify cataract removing cataract by suction. Initially central denser nucleus of cataract is targeted. Emulsified cataract fragments are simultaneously aspirated through the hallow tip of phaco probe. Posterior capsule that supports the intraocular lens is left as it is and the cortex of the lens is removed. A folded intraocular lens is inserted through the same incision into the capsular bag, the viscoelastic fluid is removed. A folded intraocular lens does not need larger incision for insertion by an injector. Sutures are not required for the surgery. Average surgery time by phaco emulsification ranges between 40 to 60 minutes.
There are different theories and mechanisms proposed for action of ultrasound phacoemulsification. While one is based on the acoustic breakdown of lenticular material due to sonic wave propagation through the fluid medium; microcavitation bubbles produced at the distal phaco tip producing intense heat and pressure emulsifying adjacent

lens material and the tip axial oscillations through its stroke length resulting in jackhammer effect mechanically breaking down lens material.
Phacoemulsification technique uses various types Phaco tips which come in different shapes / design tor cataract surgery. However, the success rate depends on kind of Phaco tip used in extracting cataract apart from the expertise. Flared ultrasonic phacoemulsification tips significantly reduce the Ultrasound (US) time and energy used in cataract surgery.
Theoretically, a circular-shaped tip introduced through a linear incision produces the maximum amount of friction at the superior and inferior opposite points of contact between the corneal tissue and the phaco tip. Total contact energy acting on these points minimizes corneal burning and corneal incision is stretched. In flat tip, friction energy distribution along a broader contact surface hence less incision stretching occurs with low friction energy quantity per unit and the heat production.
Ultrasonic phaco needle has a distal and a proximal end. The distal end is cutting end and comes in different configuration and design / shape. The cutting ability depends on shape, edge and angle of the tip. Cataract carving efficiency of a phaco tip depends on the distal bevel angle which comes in 0 °, 15 °, 30 °, 45° or 60 ° and more. Increasing angle increases cutting ability, decreasing the holding / gripping capacity. Typically a 0° degree tip is blunt with poor, nil or negligible cutting ability but it has very good holding power and also occludes (heals) easily.

Surface of the edge from cutting and holding point has another aspect of consideration. There are different types of tailor made phaco tips available with tip surface / edge as per the need.
Conventional phaco tip is constructed from a small cylindrical tube having a cutting edge located at the distal end of the tip. Coupled to the tip is an outer sleeve that has an irrigation port to introduce irrigation fluid to the working area of the lens. Phaco tip has a central aspiration opening to allow the emulsified lens tissue to be drawn out of the eye. The round end of the cylindrical phaco tip does not generate focused ultrasonic pressure. Narrow tip functions as a flow restrictor increasing resistance to flow and reducing tendency to create surge. The smaller the diameter, longer is the emulsification time, and the more manipulation necessary to emulsify the fragments. Angled tips are preferred over non-angled tips. 30° or 45° tip is most preferred and used phaco tip. With development in chopping techniques, a shift towards flatter tips has taken place with a demand for using 0° to 15° tips that allow better holding power.
There are at least eight types phaco tips currently in use for extraction of cataract. They come as single-use and multiple-use products made of high grade titanium. Use of Titanium to manufacture needle reduces friction co-efficient. However, partial coating of needle by PTFE using a deposition method is known. Said method is also be useful for Titanium but may not guarantee of good adhesion (Italian patent application no. PM97U00159, Optikon 2000 S.p.A). Selection depends on kind of technique used with

suitability of phaco tip to handle and the probe assembly considering the density and size of the cataract for surgery.
Some of the commercially available phacoemulsification tips are:
Straight tip is the most common type of tip. It is less effective because the area of movement is small especially with torsional US. It does not optimize torsional US, does not amplify the oscillation effect at the tip and decreases the ability of the tip to "shear" lens material without having to blend in considerable longitudinal ultrasound.
Tromb tip has a shape similar to trumpet. A 17-gauge flat phaco tip is 2 mm horizontal and 0.9 mm vertical and with an angle of 30° allows a wider contact surface between the corneal tissue and the tip, distributes friction energy along the whole contact surface and reducing the friction energy per contact surface unit (Optikon 2000 industries, Rome).
Trephine tip is a tip with sharp surface having very good cutting ability and uses less time and less of energy to do the surgery. However, the chances of damaging other part of the targeted tissue or organ are much higher. This tip closely resembles cylindrical saw used for cutting purposes.
Flared tip is funnel shaped. Has significantly larger circumference that enhances the area of capture of the lens fragment, reducing US time and energy. However, one has to take good precaution during surgery,

Tapered tip has a sloped inner funnel with a smaller area to occlude with fragments in the shaft but may cause occlusion.
Cobra and New flare tips direct cavitation into the opening of the bevel of the tip minimizing random emission of phaco energy.
MicroTip is a smaller tip takes significantly longer phacoemulsification time with less endothelial cell loss, low mean US powder. Aspiration is easier because inner bore is same throughout the tip (Bausch & Lomb, Claremont, California).
Singer LensQuake tip with hexagon shape and circular lumen nucleus removal is very easy, hexagon-shaped or diamond-shaped phaco tip induces a disturbance in the lens nucleus that simulates a miniature earthquake cracking the nucleus from the center to the periphery without the need to place a sharp chopping instrument near the equator of the lens.
Optikon 2000 (Rome) Pulsar Minimal Stress phaco tip is Teflon coated sleeveless phaco tip used in conjunction with a separate infusion cannula. The tip has a small diameter (0.68 mm and coated with a thin layer of Teflon, a self lubricating material and no sleeve. Characteristics of this tip is the amount of elongation of the tip preset by the surgeon at the beginning of the procedure, which remains unaltered, independent of the resistance the tip encounters during phacoemulsification maneuvers.
Usually angled tip is more efficient if one is comfortable with the bevel. Mini-flared and

tapered tips mature or dense lenses. However, efficient Zero Degree tip of Allergan's has advantages because the tip has properties that are highly beneficial for phaco chop. The Zero Degree tips occlude most easily because they have the smallest area that needs to be occluded for vacuum to be able to build.
Allergan's Zero Degree has an internal bevel that other 0° tips do not have. The bevel sharpens the edge so the Zero Degree can be effective and it creates cavitation effects improving phaco efficiency dramatically.
Nagahara's zero degree tip (Allergan Inc., Irvine, California) has an internal bevel improves US through internal cavitation and reduces cross sectional area of phaco tip. Mostel square chisel tip is another zero degree type of phaco tip. It facilitates chopping, and Mastel power chisel-sharp edges facilitate grooving.
PRIOR ART
A patented CobraTM needle (sold by Sugical Design corporation, N.Y) has a beveled distal end formed with six parabola shaped cavity generators surrounded by a spiral ribbed clear silicon infusion sleeve with infusion hole. A plurality of concave recesses present around the inner circumference of the needle.
US patent no. 4,773,415 describes an instrument comprising a length of fine surgical wire mounted on a tubular handle with an angled tip, coated with silicon rubber for use in phacoemulsification technique to hold cataract lens from posterior capsule.

US patent no. 5,213,569 discloses a phacoemulsification device wherein needle has a distal end with a lumen, distal end is beveled and flat with beveled angle in the range of 15 ° to 60 ° and is typically 30°. The outer edge of beveled flat tip is partially rounded and is provided with a recess and said recess has a continuous faceted curved surface of Gaussian kind.
EP patent no. 0619993 describes a method of removing nucleus of the eye lens by phaco surgical fragmentation using longitudinal axis probe having hallow cutting tip with serrated cutting edge rotary oscillating laterally transversely to the longitudinal axis' and against nucleus at high acoustic or ultrasonic frequencies (25 to 55kHz) over an angle of 5° fragmenting nucleus as the probe is pressed in the longitudinal axis direction against nucleus and aspirating the fragmented pieces through the hollow part of the tip.
tip having rounded edges giving larger surface area at the distal ends increasing generation of micro bubbles formed by the tip during surgery preventing from eye tissue damage when inserting into the eye as against present practice of using sharp tips and thin walls to cut tissue by jack hammer US vibration of tip.
US patent no. 5,725,495 describes a phacoemulsification hand piece, sleeve and tip illustrating a wide variety of tip configurations and needle cross-sectional configurations includes needle with wedge shape distal end, tapered or off center tip (not concentric) kind. The specific shape of the tip, including the angle, concavity, convexity, and the like designed to selectively focus ultrasonic energy.

US patent no. 5,836,959 discloses a flat oblique cutting edge tip having oblong opening channel for fluid to flow and a cylindrical proximal end. The oblong opening provides communication for the inner aspiration channel and it also forms a pair of inner shoulders at the cylindrical proximal end within the inner aspiration channel facing oblong opening to include a cavitation fluid. Tip further has an outer sleeve coupled to tip with an irrigation port.
A flat distal end has a pair of adjacent shoulders. Flat end creates efficient cutting surface and shoulders provide large surface area focusing US pressure waves into the bubbles of an irrigation fluid surrounding the tip. Said tip is for emulsifying a lens of an eye.
US patent no. 5,965,461describes a hand piece having a phaco needle or YAG laser' for extracting cataract. Said method is quick and efficient and uses a phaco needle having a sharp phaco tip.
US patent no. 5,993,408 needle with beveled or stepped edge to enhance the cutting efficiency of the cutting tip decreasing US requirement. The needle tip angled (10°, 30° or 60°) to define a cutting plane having a wide upper arc and a thin lower arc.
US patent no. 6,007,555 describes hollow phacoemulsification needle with round, square or oval tip and method of removing emulsified tissue. The needle has inner and outer surface, a proximal end and a distal end. The proximal end is attached to US hand piece for receiving US energy. The inner surface forms a passage having an inlet port at said distal end into which fragmented is aspirated forming a plurality of individual concave

recesses spaced apart around the inner surface. US energy directs and focuses a conical shaped cavitation of bubbles that is directed proximally within the said passage to emulsify the tissue drawn into said passage.
US patent no. 6,533,750 describes a phacoemulsification needle with an angulated disposed at an angle between 0 ° to 45 ° to the needle body and tip has larger diameter than the body with a tip end disposed in a plane perpendicular to a tip longitudinal axis.
US patent no. 6,592,541 describes a method of extracting cataract wherein a distal end of phaco tip has solid blade which is claw shaped with an edge adapted to be placed in contact with the nucleus.
US patent no. 6,605,054 a multiple bypass port phaco tip having multiple aspiration ports and a single discharge port to infuse liquid into the eye.
US patent application 2006/0217672 teaches and describes a phacoemulsification tip that is swaged or crimped at its distal end and said is intended for use with a hand piece producing torsional motion and the crimping forms cutting edges at the distal end.
US patent no. 7,018,389 (2002) describes an improved tip removal of cataract wherein the distal end contacting a corneal or sclera tissue is coated with an anti-friction treatment, based on carbon and tungsten carbide by PVD (Physical Vapour Deposition) technique characterized in a thin layer of chromium (Crl) coating applied during the treatment, to improve the adhesion of the subsequent depositions.

US patent no. 7,588,553 (2009) discloses phacoemulsification needle wherein rounded distal end has an outer and inner edge, said edges are smooth rounded eliminating any sharp edges and said tip defined by a distal edge that slopes at an angle other than 90° relative to a longitudinal axis of the distal potion of the hallow member. Said rounded surfaces may b rounded, dulled, detuned or blunted lacking any sharp edges not to cause any damage. Further the distal end of the needle is serrated with inner surface of the hollow member has a plurality of ridges or grooves.
The serration and the gaps between the serrations as well as the inner and outer diameter edges thereof are rounded. Serration enhanced phacoemulsification by decreasing the repulsive effect of cavitation in the gaps between the serrations.
Prior art phacoemulsification tips are angled tips from as small as 5 to 60° or more with or without serration or serrated margin or edge.
It is known that as the angle of bevel of phaco tip increases the cutting ability increases however, the holding ability decreases and hence the chances of successful extraction of cataract without damaging other part of eye decreases.
The longer the time taken for extraction of cataract more is the US energy utilized. Angled tip do not occlude easily.
Advantages of 0° phaco tip with serration are: 0° degree tips occlude most easily.
0° degree focuses both jackhammer and cavitational force directly in front of the tip and enhances occlusion caused by the smaller surface area of its orifice.

Power intensity can be modified by altering bevel tip angle.
Serrated edge or surface has good grasping power improving cutting ability.
Pointed serrated edge or surface is beneficial over blunt or smooth surface or vice a versa depending on the need and application.
The quality of the emulsification is similar whether the diameter instrument is 19, 20, or 21 gauges.
Titanium phaco tip reduces friction co-efficeint.
Therefore, there is need for a designer phacoemulsification tip that is tailor made and customized for efficient phacoemulsification. Present invention is directed towards designing a custom made phacoemuisification technique by improving the existing tips.
OBJECTS OF THE INVENTION:
An object of present invention is to provide an apparatus /instrument / equipment and/or member thereof for use in performing surgery, eye surgery.
An object of the present invention is to provide member of an apparatus / instrument / equipment and / or thereof to improve on the surgery, said surgery is eye surgery and improved qualitatively as well as quantitatively (extraction complete, and less stressful, help perform more surgeries / day without stress and strain since easier to operate using invented tip).

Further object of this invention is to provide an apparatus /instrument / equipment member by improving on the design and thus the functioning of the said part / parts of the instrument / equipment.
Still further object of this invention is to provide design of the member of an apparatus / instrument / equipment that is effective and efficient in the extraction of cataract of an eye.
Another object of this invention is to provide a design of the member of an apparatus / instrument / equipment that reduces time factor for the extracting cataract.
Yet another object of this invention is to provide tailor made design of the member of an apparatus /instrument / equipment that improves upon the recovery of the surgery faster. Still further object of this invention is to provide the member of an apparatus / instrument / equipment that works without damaging nerve / peripheral organs / nerves / vessels.
Another object of this invention is to provide improvement in the structural design, from blunt end to shaped structure of 0° angle in improving functional aspects of a member of an instrument / equipment.
Further object of this invention is to provide improvement in functional aspects of the member of an apparatus / instrument / equipment like cutting, occluding and holding efficiency and any other related.

Further object of this invention is to provide member of an apparatus / instrument / equipment which is detachable / removable when not in use.
Still further object of this invention is to provide member of an apparatus / instrument / equipment which is detachable / removable as per the need.
Another object of this invention is to provide member of an apparatus / instrument / equipment which extracts cataract with success rate of 100%.
Another object of this invention is to provide member of an apparatus / instrument / equipment extracts cataract just by making a small incision that heals very fast.
Another object of this invention is to provide member of an apparatus / instrument / equipment that is improved upon cost to performance and success ratio along with benefits.
SUMMARY OF THE INVENTION:
According to present invention there is provided a Phaco tip or part thereof for use in extracting cataract.
There is provided a customized member of an apparatus / instrument functionally operative with a drive assembly for use in eye care comprising;

a member in an operative configuration having a distal end and a proximal end and proximal end coupled to drive assembly comprising;
a distal end of a member having a custom made / customized tip adapted for holding, cutting and extracting defined material;
a distal end of a member having a tip with uneven / irregular inner surface' and uneven outer surface;
a distal end of a member having a tip with an uneven / irregular uneven / irregular inner surface and outer surface along the circumference;
a distal end of a member having a tip portion with an uneven / irregular uneven inner surface and outer surface along defined part of the circumference;
a distal end of a member having a flat uneven / irregular tip with a set angle for pre-defined purposes:
a distal end of a member having a lumen for aspirating extracted defined material; and
a proximal end having a sleeve / no sleeve;

a proximal end coupled / engaged to drive assembly for coupling energy; and
a drive assembly driven by ultrasonic power engaged in supplying ultrasonic power; and a drive assembly driven engaged in supplying ultrasonic power for breaking / fracturing defined material and broken material to aspirate and discharge from at defined location. Typically, a member of an apparatus / instrument is for use in eye care for extraction of cataract.
Typically, a member of an apparatus / instrument is phaco tip or phaco needle for use in phacoemulsification of cataract.
Typically, distal end of custom made phaco tip / phaco needle is adapted for holding and cutting and extraction of cataract.
Typically, custom .made distal end of phaco tip / phaco needle is having an uneven / irregular inner surface and outer surface, said uneven / irregular inner surface and outer surface having pointed sharp serrations with customized number of pointed sharp serrations.
Typically, inner and outer pointed sharp serrated edge / surface of phaco tip / phaco needle is along a defined portion of circumference with customized number of serrations.

Typically, distal end of a phaco tip / phaco needle is disposed at set angle and said set angle is 0° degree / zero degree angle, alleviating holding ability of cataract, to ease an occlusion of incision.
Typically, customized sharp pointed serrations along a define0" portion of circumference of the phaco tip or phaco needle are adapted /customized having sharp and pointed serration ease holding, and cutting and extraction of cataract in sclero corneal tunnel incision.
Typically pcoximat end is sleeved /sleeveless having a proximal end., a threaded structure adapted to couple / engage into a drive assembly (directly / indirectly) ,as a source of ultrasonic energy.
According to this invention ultrasound drive assembly is driven by ultrasonic power engaged in supplying ultrasonic energy for breaking / fracturing cataract, aspirating fractured material and discharging said aspirated fractured material through lumen outside the eye at defined location.
The present invention provides a novel combo Phaco Tip design with botn cutting and holding abilities especially designed for the 0° Phaco tip.

Present invention discloses / envisages a phacoemulsification tip having defined structure with defined configuration and encompasses method of operating cataract.
BRIEF DESCRIPTION OF DRAWINGS: (to finalize after confirmation of first draft with desired modification)
The invention will now be disclosed in relation to the accompanying drawings, in which: Figure 1 shows / illustrates Figure 2 Figure 3 Figure 4
DETAILED DESCRIPTION OF PRESENT INVENTION (To finalize after confirmation of first draft with desired modification)
Figure 1 shows
According to one aspect of the present invention there is provided an improved phaco tip for effective and efficient extraction of cataract during phacoemulsification. Certain improvement has been brought in by modifying the phaco tip and thereby the phacoemulsification.
The Phaco tip is available in varied range of angles. The range includes from 0 °, 15 °, 30°, 45 °, and 60° or more. There exists a relationship between the angle of the Phaco Tip to that of the ability of cutting, occluding and holding power / ability. An increase in the

angle of bevel of Phaco Tip and is directly proportional to increased cutting ability and inversely proportional to the holding ability.
Present invention relates to phaco tip that is specially designed for conveniently extracting cataract. Essentially a Phaco Tip of the present invention has benefit of the two above said properties. Phaco tip is an improved and modified 0° Phaco tip. The modifications have been brought in by introducing specific design of 0° Phaco tip edge along its circumference. A saw like or serrated edge / margin of Oo Phaco tip of varying the number of serrations is designed. By varying number of serrations of the present invention 0° Phaco tip having a circular edge / margin meaning the serrations are present along the circumference completely or partially giving a typical appearance of complete serrated circular edge / margin or partial serrated edge/ margin with smooth partial edge / margin thus providing a peculiar uniform or mixed or varied / assorted cutting surface area for a 0° Phaco tip along the edge. These two different tips with particular serration patterns have different applications. For example a completely serrated circular edge / margin 0° Phaco tip has more number of serrations and is useful in clear corneal tunnel incision whereas a partially serrated edge / margin (half serrated and half smooth edge) of a 0° Phaco tip has less number of serrations (half of the complete serrated edge tip) for use in sclera corneal tunnel incision preventing damage to iris.
A Phaco tip of present invention Phaco tip is essentially 0° angle tip with substantially good holding, cutting and extracting capacity. Said Phaco tip is useful in cataract extraction with good success rate (as good as 100%).

Phaco tip is hallow and has ... mm external / outside diameter and .... to ... internal / inside diameter available and composed of titanium metal without beveled end. Tip end had a 0° angle in the present invention phaco tip for easy entry into the eye.
Usually 0° angle tip is blunt does not have good cutting ability but it occludes easily giving / providing a very good holding power. Such kind as compared to angled (15 °, 30 °, 45 °) Phaco tip are not useful.
In the preferred embodiment phaco tip is designer's tailored customized 0° angle tip. Said improved phaco tip has not only good cutting and occluding capacity but also improved holding and extracting capacity. This is beneficial in efficient management of phacoemulsification technique by effective and efficient extraction of cataract with small incision improving reduction in time for extraction.
Another aspect of the present invention is to provide 00 angle Phaco tip with serrations. Said serration is pointed kind of serration with variable number as per the need of surgery. Preferably the serrations are pointed and the number of serrations can be varied. Pointed serrations improve upon the efficiency cutting and holding ability. The number of serrations for reducing time required for surgery by Phaco Emulsification by l/4th of the time from 40 to 60 minutes to 10 to 15 minutes.

The number and the shape of serrations can be varied as per demand of surgeon. 0° angle Phaco tip with serrations of full or half circumference of the tip can be designed and manufactured.
More preferably, present invention Phaco tip with full circumference serrations has application in clear corneal tunnel incision and half circumference serrations in sclero corneal tunnel incision preventing any damage to iris.
In another aspect / embodiment the phaco tip of present invention wherein 0° phaco tip has serrations along the complete edge area providing rriore number of serrations improving efficiency and useful in clear corneal tunnel incision eye surgery.
In yet another embodiment, serrations are in partially covering partial edge of 0° tip 0 with half of the number and useful in sclero corneal tunnel incision eye surgeroy.
With smooth or round edge / margin / surface along the circumference of Phaco tip allow slipping away rather than providing a firm grip or holding capacity. If the circumference of Phaco tip is uneven or pointed firmness over the grip or holding is possible. Present invention 0° angle Phaco tip is provided with serration which is like a saw kind of serrations. Serrations ease holding and thereby takes lesser time is required for cutting / chopping prior to extraction. Serrated kind of Phaco tip are also beneficial to have proper grip over cataract without much stress, and strain by avoiding need to twist during Phaco

Emulsification causing less damage to the peripherals / peripheral region. As the holding power improves, cutting and extraction becomes easier.
One of the benefits of using present invention tip serration provide number of cutting edges forming multiples grooves is efficient cracking / cutting, holding / gripping without slipping away of cataract but without damaging the posterior capsule which otherwise impair the vision.
Another benefit being 0° angle occludes easily. Present invention 0° angle serrated tip occludes easily in shorter time period.
Further benefit is the ease to manage and handle cutting surface produces less stress on the iens and surrounding area and less stress and strain on the surgeon.
The shape of Phaco Tip changes with angle. The 0° tip is blunt and therefore, does not have cutting ability but it occludes easily giving / providing a very good holding power. It is possible to improve upon the cutting ability by increasing the angle of bevel of Phaco Tip, however, by doing so the holding ability decreases. The 0° tip occludes more easily than 45 ° in smaller surface area and seals more readily than larger bevel. A tip occludes when surface to be occluded is parallel to the needle bevel.
ADVANTAGES AND APPLICATIONS
0° angle has good cutting ability occludes very easily and being sharp with serrated edge along its circumference or half circumference Serrated tip provides better cutting and holding ability.

Variable number of serrations is beneficial improving cutting and holding capacity as per need for different use and applications.
A substantial reduction in surgery time by 75% (from 10 to 15 minutes from 40 to 60 minutes) is possible.
A substantial low US energy required.
Provide examples for best mode / working of the tip
While considerable emphasis has been placed herein on the specific elements of the preferred embodiment, it will be appreciated that many alterations can be made and that many modifications can be made in the preferred embodiment without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We Claim;
1. A custom-made member of an instrument / equipment, functionally operative with a drive assembly, for use in eye care comprising said customized member in an operative configuration having a distal end and a proximal end and said proximal end coupled to drive assembly wherein, said member comprising:
- custom-made tip, attached to said distal end, adapted for holding, cutting and extracting a defined material, said custom-made tip having irregular edges defined at least at defined portions along its circumference, said irregular edges being defined with a pre-defined set angle for pre-defined purposes;
- lumen, at said distal end, for aspirating extracted defined material;

- said proximal end having proximal end adapted to fit in another member of said instrument / equipment; and
- drive assembly, coupled to said proximal end, driven by ultrasonic power engaged in supplying ultrasonic power and said ultrasonic power for aspirating defined material to discharge said broken material at defined location, coupled to said proximal end.
2. A custom made member of an instrument / equipment as claimed in claim 1 wherein, said
member is phaco tip for use in phacoemulsification of cataract.
3. A custom made phaco tip according to claim 1 and 2 having an irregular edge of distal
end wherein said irregular edge includes serrations selected from pointed smooth serrations or
pointed sharp serrations and said pointed sharp serrations having customized number of pointed
sharp serrations adapted for holding, and cutting the cataract,

4. A custom made phaco tip according to claim 1 and 3 wherein said serrations include a customized number of said serrations at distal end along its full circumference and said configuration is adapted for holding and cutting of cataract in clear corneal tunnel incision.
5. A custom made phaco tip according to claim 1 and 3 wherein said serrations include a customized number of said serrations at distal end along defined portion of its circumference and said configuration is adapted for holding and cutting of cataract in sclerocorneal tunnel incision.
6. A custom made phaco tip according to claim 1, 4 and 5 wherein, said distal end of phaco tip is
disposed at a pre-defined set angle and said pre-defined set angle is 0° degree / zero degree for improving holding and cutting ability of cataract and occlusion of incision after extracting cataract in corneal tunnel incision or sclera corneal tunnel incision.
7. A custom made phaco tip according to claim I wherein, proximal end of said proximal end, sleeved or sleeveless, is a threaded structure adapted to fit in another member of said instrument / equipment; said member is coupled to drive assembly and said drive assembly is driven by ultrasonic power engaged in supplying ultrasonic energy assists in breaking cataract.
8. A custom made phaco tip according to claim 1, wherein said drive assembly is ultrasound drive assembly using Ultrasonic energy for breaking cataract, aspirating broken cataract and discharging aspirated broken cataract through lumen of said instrument / equipment outside eye at defined location.