Visual accommodation of 39 teleosts and 4 elasmobranchs were examined by means of the electrical stimulation of the excised eye.Photographs of the eyes were taken before and during the stimulation.From these photographs, the range of accommodation was estimated and compared among the fishes.In most of marine and some of freshwater teleosts, the accommodation was accomplished by the displacement of the lens position.It was found that these teleosts had the range of accommodation from the distance less than the standard length before their eyes to infinity.
Any lens movement due to the electrical stimulation was not observed in all species of elasmobranchs and 4 species of teleosts.Deformation of the eye globe was not observed in any fish species experimented.