Abstract:AIM:To investigate the effects of progressive addition lenses(PAL) on visual display terminal (VDT) operators visual fatigue.·METHODS:Nienty-eight VDT operators who had ametropia and visual fatigue were collected between Aug.2008 and Aug.2009 and divided voluntarily into two groups,single vision lenses (SVL) group with 52 patients and PAL group with 46 patients,the refraction condition and treatment effect of the two groups were analyzed in one year’s follow-up.·RESULTS:Of the 98 patients,44 patients couldn’t have their refraction errors corrected.Significant difference was found between SVL and PAL group in the symptoms like blur and swell (P<0.01),however,no difference was found between SVL and PAL groups in the symptoms like eye pain,dryness,eyelid heaviness.·CONCLUSION:Compared with SVL,PAL had an active clinical effect on relieving visual fatigue for lower and middle myopes.
