Abstract
The amount of zinc in eye of ten kinds of fishes was determined quantitatively by the Dithizone method. Zinc content was generally proportional to the size of eye, and the contents in a fresh eye were 0.02 to 0.08%. The eye was sectioned into lens, vitreous body, iris, retina and choroid, and the zinc contents in each sections were determined ; the largest amount of zinc was contained in the choroid, and decreased in order of the retina, iris, lens and vitreous body. About 80% of zinc in the eye was present in the choroid, and about 18% in the retina.
