Posted: May 18, 2011 10:11 pm
by ramseyoptom
A human retina


MOD Diabetic(8457)2.jpg


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For those not in the know, this is a right eye of a type 1 diabetic with a pre-proliferative diabetic retinopathy and a vitreous heamorrage at 6 o'clock (the half moon shape). The branching lines are the superior and inferior branches of the retinal artery (the lighter coloured blood vessels) and the retinal vein (the darker blood vessels) and are running from the optic disc (the round light yellow disc, the white area is the disc cup) over the anterior surface of the retina. With the nerve fibre layers below the main retinal vessels, the capillarys run through the retinal nerve fibre layer in order to supply bothe the ganglia and the photoreceptors with nutrients.
The even red glow is from the choriodal vessels and these are below the retina, and under the pigment epithelium, and are best seen in the fundus of an albino.