抄録
Crystaline-lens cataract occurs as a result of aging of ocular media, which brings change in specturm of light falling on retina. We examined the effect of cataract on color perception by comparing color vision performances of young obsrevers with and without a glasses (simulating difference in spectral transmittance of clystaline-lens of 80yrs and 20yrs) in several psychophisical methods. Our result suggests that when young observer wares this special glasses, only flicker-sensitivity showed changes consistent to spectrum change on the retina. Other color vision showed smaller changes than expected from the change in spectrum. However, these changes do not coincides to the changes in color vision of actual aged-observers (Shefrin and Werner, 1993 ; Kraft and Werner, 1994). Therefore, some change in neural mechanisms in higher order visual system may play a significant role in changes of color vision mechanisms across aging.
