The Aspect of the Brightness Sensitivity in the Parafovea and Perifovea

Summary of experiment 1 Using the reaction time method, the brightness sensitivity of 15 retinal loci in the perifovea around the fovea were measured. Stimulus condition : 5′, 16Nit. 100msec, photopic vision Stimulus retinal locus : 6°, 8°, 10° from the fovea, 5 directions on the perifovea in the right eye Subject : 10 right hand dominant subjects Results The nearer to the fovea the retinal locus was, the better the brightness sensitivity in the perifovea was. The brightness sensitivity from the nasal retina to the superior retina was better than that from the nasal retina to the inferior retina. The brightness sensitivity in the inferior retina was worse than that of the other retinal loci