Exopthalmia, endopthalmia, cataracts and eye loss are abnormalities of the fish eye encountered by fish culturists from time to time by detailed descriptions of abnormalities of this organ are uncommon in the literature. Investigations of the pathology of this organ are generally restricted to the study of cataracts or cataracts resulting from parasitic infections or nutritional abnormalities.
Iwama, George K.. 1979. One Eye, A Disease of Rainbow Trout (Salmo gairdneri) at the Kootnenay Trout Hatchery, British Columbia. Ministry of Environment. Fisheries Technical Circular. FTC42