Abstract:

Objective    To investigate performance characteristics of blue-on-yellow perimetry in 24 degree in young people with different degrees of myopia and to investigate its related factors. Methods    109 21-30 year-old patients (160 eyes) were performed blue and yellow perimetry in 24 degree using automated perimetry application Humphery750 II-i computer center 24-2 blue-yellow perimetry testing procedures. The patients were divided into the emmetropia, low myopia, moderate myopia and high myopia groups. The five blue-on-yellow visual indices were compared and the influencing factors，including mean sensitivity，four quadrant retinal light sensitivity, range of each eccentricity average retinal light sensitivity, mean visual field defect values(MD), and pattern standard deviation(PSD) were analyzed. Results    The differences of  MS， MD and PSD values in central 24 degree of between four groups had statistically significant difference(F=21.449, 13.191, 6.854； with P=0.000, 0.000 and 0.000， respectively), except the low myopia and moderate myopia group (P=0.326, 0.370, 0.268). Each group in each quadrant retinal light sensitivity difference was statistically significant (F=14.803, 26.163, 15.035, 14.276; P=0.000, 0.000, 0.000, 0.000), except the low myopia and moderate myopia group(P=0.360, 0.192, 0.083, 0.323). Eccentricity range of retinal light sensitivity difference was statistically significant between groups (F=9.849, 14.460, 14.143, 13.959, P=0.000, 0.000, 0.000, 0.000 ), except the low myopia and moderate myopia group(P=0.272, 0.262, 0.776, 0.968). Myopia degrees with an average retinal light sensitivity and an average visual field defect value was negatively related (r=-0.528, -0.441, P<0.01), myopia and mode standard deviation was positively related (r=0.336, P<0.01). With the deepening of myopia, the various eccentricity retinal sensitivity downward trend increases (-0.392, -0.461, -0.437, -0.436, P<0.01). Conclusion    Retinal light sensitivity values of mean visual field defect, pattern standard deviation (PSD) is influenced by the degree of myopia in each quadrant of the average retinal light sensitivity with asymmetry and with the growth in the degree of myopia showed downward trend by myopia center 24 degree blue and yellow perimetry. With the increasing of eccentricity, the average retinal light sensitivity of the peripheral portion significantly decreases with the degree of myopia growth downward trend.

Key words: Cone cells, Myopia, Blue-yellow perimetry, Color vision