Cataract surgery

1. The eye is made up of three layers: the retina, uveal tract, and sclera, which is continuous with the cornea. 2. Drugs are used during surgery to achieve specific effects. Nonsteroidal anti-inflammatory drugs reduce irritation and maintain the dilation effect of cycloplegics and mydriatics. Viscoelastic substances protect the nonregenerative endothelial cells. 3. The risks involved with cataract surgery include hemorrhage in the anterior chamber, a tear in the posterior capsule, and damage to the endothelial cells and retina.