Cataract surgery is the treatment of visually significant cataract, which is the commonest cause of treatable blindness and visual impairment. Surgery is done by any of the following techniques:

• 1.1 Phacoemulsification.

• 1.2 Conventional extracapsular cataract extraction.

• 1.3 Manual small incision cataract surgery.

• 1.4 Lensectomy.

• 1.5 lntracapsular cataract extraction.