I always wondered why the fovea, being a depression, remains confocal with the retina?
Aaah - I guess the retina has thickness and the top layer is transparent so it focusses below the surface, but the fovae has a thinner transparent layer so appears depressed.
That is a great point...I have no idea. The fovea, has a much higher concentration of sensors than the rest of the retina. As a result, it must also have a greater concentration of ganglion nerves, so I would not expect a thinner, more transparent layer.
I always wondered why the fovea, being a depression, remains confocal with the retina?
Aaah - I guess the retina has thickness and the top layer is transparent so it focusses below the surface, but the fovae has a thinner transparent layer so appears depressed.
That is a great point...I have no idea. The fovea, has a much higher concentration of sensors than the rest of the retina. As a result, it must also have a greater concentration of ganglion nerves, so I would not expect a thinner, more transparent layer.