The basic anatomy of cornea includes its measurements and gross anatomy of all layers. Cells of each layer, their composition and the attachments are described. The microscopic anatomy gives the finer points of all these layers. Lymphatics and nerve fibres are discussed in detail. Degeneration, regeneration and hyper regeneration of corneal nerves are important. The sensitivity of cornea and their visibility have important role in the clinical study of cornea. Knowledge of limbus and its various zones is important for an eye surgeon.