What are the features of the structure of the eyes in fish?

Fish eyes are structured and used in different ways.

Fish have a cornea, a lens for “photographing,” an iris for adjusting light, a retina containing light-sensitive cells, and an optic nerve to translate images into the brain. The cornea is round, so fish can take 360-degree images of their environment. The corneas of fish are compensated for by almost the same density as water, which results in a slight bend as images are transferred from the water to the eyes of the fish.