[A study on retinal light sensitivity of normal human visual fields].

The full threshold program of QZS-2 automated perimetry made in China was used to measure the retinal light sensitivity of the central 30 degrees and peripheral 30 degrees-60 degrees visual fields of 111 eyes of 59 normal persons. Their ages ranged from 15-68 years and the average age was 38.4 years. From the corresponding respective comparisons of the results, it is shown that the mean light sensitivity of the macular, central 30 degrees and peripheral 30 degrees-60 degrees visual fields between the left and right eyes has no statistical significant differences (P > 0.05), and there are also no statistical significant differences (P > 0.05) in the mean light sensitivity of the central and peripheral fields between the male and female subjects. The mean light sensitivity declines linearly with the increase of age and eccentricity. The mean light sensitivity of the central and peripheral visual fields decreases 0.6 dB and 0.7 dB, respectively, with each one decade increase of age. The mean light sensitivity also decreases by 2.6 dB per 10 degrees eccentricity. The mean short-term fluctuation in the normal subjects is 1.39 +/- 0.56 dB.