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optic disc

British  

noun

  1. a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve See blind spot

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Why does the blind spot from the optic disc in either eye not result in a blind spot in the visual field?

From Textbooks • Jun. 19, 2013

For nine years I have watched the progress of such a glaucoma in a man now aged 87, with slow development of glaucomatous cupping of the optic disc, now more than 3 D. deep.

From Glaucoma A Symposium Presented at a Meeting of the Chicago Ophthalmological Society, November 17, 1913 by Nance, Willis O.

The optic disc appeared somewhat cloudy, with very evident venous pulsation.

From Neuralgia and the Diseases that Resemble it by Anstie, Francis E.

The optic disc becomes deeply cupped and the tissues of the optic disc and optic nerve extremely atrophied.

From Glaucoma A Symposium Presented at a Meeting of the Chicago Ophthalmological Society, November 17, 1913 by Nance, Willis O.

Snell gives an instance in which a piece of steel was imbedded close to the optic disc with retention of sight.

From Anomalies and Curiosities of Medicine by Pyle, Walter L. (Walter Lytle)