ABSTRACT
Eyes normally appear ‘white’, ie the white scleral wall of the eye is visible through the transparent conjunctival covering. The conjunctiva and the intermediate layer between it and the scleral wall-the episclera-does contain intrinsic blood vessels, normally almost invisible. Furthermore, the wall of the eye surrounding the clear cornea contains blood vessels that supply the front portion of the eye. In any situation where the eye becomes subject to inflammatory disorders, blood vessels dilate and may haemorrhage. Against the normal white background of the sclera, dilated blood vessels give an eye a pink or red appearance graded according to severity of the inflammation.
