VSR 421: Regional Veterinary Surgery (2+1)

Technique for removal of lens

TECHNIQUE OF REMOVAL OF LENS

• The operation is done under general anesthesia
• The eyeball is fixed during the operation by one or more stay sutures passed through the sclera.

Eye ball positioned for cataract surgery

• The cornea is punctured above the 3 – O – clock point, about 0.1 cm away from the limbus. By using a small scissors or the Graefes’ knife the incision is extended upwards along the cornea parallel to the limbus, to the 9 – O – clock point.
• In intracapsular extraction, the lens is held close to its equator with a special forceps (Duthies’ forceps or Arrugas’ forceps) and then it is gently moved and detached fromm its suspensory ligament.
• If extracapsular ectraction is desired,the anterior capsule of the lens is incised in the form of a T and a cataract scoop is used to remove the lens substance.
• After removal of the lens the corneal wound is sutured. Conjunctival keratoplasty is advisable. Postoperative interference by patient should be guarded against. For this it is desirable to administer sedatives for at least two or three days.
• Phacoemulsification and IOL implantation. 
• Phacoemulsification is a procedure in which the lens is ultrasonically fragmented and aspirated through an incision about 3.2 mm and extended upto 8mm and 4.2mm with rigid and foldable lens implantation respectively

Phcoemulsification in progress