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Ophthalmology Retina 1a3122d3

Not true regarding retinal anatomy

A
Most of the layers of retina are absent at foveala
B
The layer of retina in contact with vitreous is retinal pigment epithelium
C
Posterior pole consists of optic nerve head and macula
D
Fovea has a zone where there is no blood supply
High-Yield Explanation
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

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