<prompt> Not true regarding retinal anatomyMost of the layers of retina are absent at fovealaThe layer of retina in contact with vitreous is retinal pigment epitheliumPosterior pole consists of optic nerve head and maculaFovea has a zone where there is no blood supply  <response>: Layer in contact with vitreous is internal limiting membrane Foveal Avascular Zone- No blood vessels in this zone Geometric centre is centre of macula Fixation point Impoant landmark in FA Ora serrata Foveola: Thinnest pa of retina Posterior Pole: Macula Optic nerve head Optic disc approx: 1.75 mm H, 1.90 mm V Macula: 5.5 mm Temporal to optic disc Fovea - Centralis : Central depressed pa of Macula, 1.5 mm Foveola - 0.35 mm. Thinnest pa of retina after ora serrata. Contains no rods, only cone are there that are covered by internal limiting membrane The axons are arranged horizontally and are called Henles layer 