Retina Anatomy(Introduction)

Dr Mahtab Alam KhanzadaFCPS (ophthalmology)

FICO (vitreo-retinal surgery)

Assistant Professor Liaquat University of Medical & Health

Sciences Jamshoro

The retina is a thin, semitransparent, multilayered sheet of neural tissue that lines the inner aspect of the posterior two-thirds of the wall of the globe.

It extends almost as far anteriorly as the ciliary body, ending at that point in a ragged edge, the ora serrata .

The outer surface of the sensory retina is apposed to the retinal pigment epithelium and thus related to Bruch's membrane, the choroid, and the sclera.

The inner surface of the sensory retina is apposed to the vitreous humor.

Blood supply : Choriocapillaris---outer third of the retina Branches of the CRA---inner two-thirds . The fovea is supplied entirely by the Choriocapillaris

• Layers of the Retina

Schematic drawing of the functional parts of the rods and cones