What is Coats' disease?

Coats’ disease, also known as Exudative Retinitis, is an uncommon eye condition which affects the smaller blood vessels (capillaries) found in your retina – the light sensitive layer which lines the inside of your eye. Coats’ disease can make these blood vessels weak and grow incorrectly causing them to leak fluid and blood under your retina. This means that the cells of your retina can’t work properly and this can cause sight to be affected.

Coats’ disease usually occurs in children or teenagers under the age of 18 but most often before the age of 10. It affects boys more than girls, and most children with Coats’ disease only have the retinal changes in one eye.

We have produced a factsheet on Coats' disease:

For more information about Coats' disease and other eye conditions please contact our Helpline on:

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