How the human eye actually works.

Ophthalmology begins with anatomy. These illustrated guides walk you through the cornea, lens, retina, optic nerve and the vitreous — the six structures your ophthalmologist examines at every visit. Whether you are preparing for cataract surgery, understanding a retina report, or simply curious about how vision forms in the brain, this section gives you the vocabulary to have an informed conversation with any eye specialist. Each explainer is reviewed by Dr. Shantanu Kumar Gupta (MS, MAMC — New Delhi) and pairs medical accuracy with plain-language patient examples from our Varanasi clinic.