Back قرص بصري (تشريح) Arabic Optički disk BS Disc òptic (oftalmologia) Catalan Οπτικός δίσκος (ανατομία) Greek Papila óptica Spanish Pimetähn Estonian Disko optiko (oftalmologia) Basque הדיסק הראייתי HE Optički disk Croatian Papilla ottica Italian
| Optic disc | |
|---|---|
 Ophthalmoscopy photograph showing the optic disc as a bright area on the right where blood vessels converge. | |
 The terminal portion of the optic nerve and its entrance into the eyeball, in horizontal section. | |
| 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 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.
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]
- ^ "blind spot". Encyclopædia Britannica. 2011. Retrieved June 21, 2017.