optic disc in dogs

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]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the optic disc is

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]. The atlas records it as a organ at the organ scale in the dog.

Where the optic disc is

It sits in the head, within the nervous and sensory systems. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the optic disc connects to

The atlas records 3 typed relationships for it, across 2 kinds of connection. part of organ and retina.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the optic disc. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as optic disk, optic nerve disc, optic nerve head, optic papilla, physiologic blind spot and physiologic blind spot of mariotte. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001783, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Part of: organ and retina.
A kind of: anatomical structure.

Questions

Where is the optic disc?

What does the optic disc connect to?

Part of: organ and retina.

Is the optic disc the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.