fovea and optic disc
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Fovea (fovea centralis):
1.5 mm depression on posterior pole of retina
Fovea central region of fovea measures about
200 microns
Macula lutae:
5 mm area surrounding fovea
Macula lutae: ganglion cells off to side
unobstructed light entry
Macular Degeneration
Macula lutae:
blind spot
Optic disc
interface where ganglion cell axons travel to enter the optic nerve
Optic disc
Fovea absence of
blood vessels
Macula lutae: absence of
blood vessels
Fovea mostly found here
cones
Fovea 1:1 ration of
cones to ganglion cells
Fovea specialized for
fine detailed color discrimination
reduction in most layers of retina except for
photo receptor layer
