loading...| Preferred Name |
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| Synonyms |
optic disk optic nerve head optic papilla physiologic blind spot of mariotte optic nerve disc physiologic blind spot |
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| Definitions |
The optic disc or optic nerve head is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called 'the blind spot' or the 'physiological blind spot'. The optic nerve head in a normal human eye carries from 1 to 1.2 million neurons from the eye towards the brain. [WP,unvetted]. |
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| ID |
http://purl.obolibrary.org/obo/UBERON_0001783 |
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| database_cross_reference |
CALOHA:TS-2153 MESH:D009898 EMAPA:18238 EHDAA2:0001307 UMLS:C0029127 VHOG:0000551 Wikipedia:Optic_disc EFO:0001974 NCIT:C12760 SCTID:362518006 EHDAA:9077 FMA:58634 MA:0000278 |
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| definition |
The optic disc or optic nerve head is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called 'the blind spot' or the 'physiological blind spot'. The optic nerve head in a normal human eye carries from 1 to 1.2 million neurons from the eye towards the brain. [WP,unvetted]. |
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| depiction |
http://upload.wikimedia.org/wikipedia/commons/e/ed/Gray879.png |
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| external_definition |
The small blind spot on the surface of the retina. It is the point where the fibers of the retina leave the eye and become part of the optic nerve. [TFD][VHOG] |
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| has_exact_synonym |
optic disk |
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| has_obo_namespace |
uberon |
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| has_related_synonym |
optic nerve head optic papilla physiologic blind spot of mariotte optic nerve disc physiologic blind spot optic disk |
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| homology_notes |
(...) we reach the inescapable conclusion that the last common ancestor of jawless and jawed vertebrates already possessed an eye that was comparable to that of extant lampreys and gnathostomes. Accordingly, a vertebrate camera-like eye must have been present by the time that lampreys and gnathostomes diverged, around 500 Mya (reference 1); Although the eye varies greatly in adaptative details among vertebrates, its basic structure is the same in all. The human eye is representative of the design typical for a tetrapod (reference 2).[well established][VHOG] |
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| id |
UBERON:0001783 |
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| in_subset |
http://purl.obolibrary.org/obo/uberon/core#human_reference_atlas http://purl.obolibrary.org/obo/uberon/core#efo_slim |
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| label |
optic disc |
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| notation |
UBERON:0001783 |
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| part_of | ||
| RO_0002175 | ||
| treeView | ||
| subClassOf |