noun, the organ of sight of animals, containing light-sensitive cells associated with nerve fibres, so that light entering the eye is converted to nervous impulses that reach the brain. In man and other vertebrates the iris controls the amount of light entering the eye and the lens focuses the light onto the retina. Related adjs ocular, oculate, ophthalmic, optic

From Collins

©HarperCollins 2008. Collins English Dictionary definition of eye