Tag: unusual sclerae

The sclera is the opaque, fibrous, protective, outer layer of the eye containing mainly collagen and some elastic fiber. In humans, the whole sclera is white, contrasting with the coloured iris, but in other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show. Fictional characters may have unusual sclerae that do not conform to that, however, with their sclerae usually being of an otherwise impossible colour for their species.