Optic disc
Optic nerve head, the point of exit for ganglion cell axons leaving the eye / From Wikipedia, the free encyclopedia
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The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye. Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye.
Optic disc | |
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Details | |
Synonyms | Optic disk, optic disc, optic nerve head, blind spot, Mariotte blind spot, Mariotte's blind spot, optic papilla, discus nervi optici [TA], papilla nervi optici, porus opticus) |
Identifiers | |
Latin | discus nervi optici |
MeSH | D009898 |
TA98 | A15.2.04.019 |
TA2 | 6788 |
FMA | 58634 |
Anatomical terminology |
The ganglion cell axons form the optic nerve after they leave the eye. The optic disc represents the beginning of the optic nerve and is the point where the axons of retinal ganglion cells come together. The optic disc in a normal human eye carries 1–1.2 million afferent nerve fibers from the eye toward the brain. The optic disc is also the entry point for the major arteries that supply the retina with blood, and the exit point for the veins from the retina.[1]