The optic cup is the pale central depression within the optic disc, where there are no nerve fibres. The ratio of cup to disc size is a key measure in eye examinations.
| Location | Centre of the optic disc at the back of the eye |
|---|---|
| Parts |
|
| Nerve Supply | Optic nerve |
| Blood Supply | Central retinal artery and vein; Short posterior ciliary arteries |
Normal anatomical feature where nerve fibres turn to exit the eye.
A cup-to-disc ratio above about 0.6, a difference between eyes, or a notch in the rim raises suspicion of glaucoma. Imaging tracks changes in the cup over time.
Enlargement of the cup as nerve fibres are lost in glaucoma.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
