fovea and optic disc

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