An exceedingly rare, benign, congenital, corneal tumour characterised by bilateral opacification of the cornea with superficial greyish layers and irregular raised whitish plaques, as well as fine blood vessels covering the central cornea, and intact peripheral corneal borders. No other ocular or systemic abnormality is noted. The pattern of inheritance described in the affected family is consistent with X-linked transmission. [from SNOMEDCT_US]