Latin excavatio disci FMA 77664 | TA A15.2.04.020 | |
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The optic cup is the white, cup-like area in the center of the optic disc.
The ratio of the size of the optic cup to the optic disc (or cup-to-disc ratio) is measured to diagnose glaucoma. A normal cup to disc ratio is 0.3; a larger ratio may suggest glaucoma.
References
Optic cup (anatomical) Wikipedia(Text) CC BY-SA