Wistar rats weaned were raised through 10 weeks under cyclic illumination of 12 hours light and 12 hours darkness,with four different fluorescent colour lighting condition:75 lx and 300lx blue light,300 lux white and 300lux pink light to study the change of superoxide dismutases(SOD)and lipid peroxied(LPO)in the retina.This paper shows that photic oxidative reaction reduces SOD in the retina and oxidizes polyunsaturated fatty acids to become LPO and that complex visible light oxidizes retina easier than simple wave lengths visible light does.The shorter the wave lengths of visible light is and the brighter the illumination is the more serious the oxidative damage of the retina is. （Chin J Ocul Fundus Dis,1993,9:14-16）