optic disk


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Related to optic disk: optic cup, fovea

optic disk

[′äp·tik ‚disk]
(neuroscience)
The circular area in the retina that is the site of the convergence of fibers from the ganglion cells of the retina to form the optic nerve.
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You can locate the optic disk by noting where the blood vessels originate or the blue arcs terminate in Activities 6 and 10, respectively If you keep one eye closed and blink with the other eye while looking at a uniformly illuminated surface (such as the inner surface of a ping pong ball cut in half to fit over the eye), you may see a gray disk at the location of the optic disk (Palmer, 1991).
Exploring the anatomy of your own eye
Only those in which we can detect or document a change in the optic disk do we call pre-perimetric glaucoma.
Don't be blind-sighted by glaucoma: with early detection and treatment, you can often protect your eyes against the profound and permanent vision loss from glaucoma
The anterior or intraocular optic nerve consists of a short segment (about 1 mm) that passes through the lamina cribrosa of the sclera and includes the optic disk as visualized on ophthalmoscopy.
Posterior ischemic optic neuropathy related to profound shock after penetrating thoracoabdominal trauma

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