THE AGE-OF-ONSET OF POSTERIOR VITREOUS DETACHMENT

The age of onset of posterior vitreous detachment (PVD) was studied in 930 eyes with a clearly defined onset time and no vitreoretinal disea ses except refractive error or equatorial degeneration. We found a pos itive correlation between onset age of PVD and refractive error, with the regression line y=0.91 x+60.93 (y onset age, x diopter of refracti ve error). The higher the degree of myopia, the younger the onset age of PVD. Comparing onset ages for 240 eyes from males and 690 eyes from females, there was a possible tendency toward a lower PVD onset age f or females. There was no significant difference in onset age between 1 12 eyes with and 818 eyes without equatorial degeneration of the retin a.