Effect of age on visual outcome following cataract extraction

Aim-To determine the effect of age on final corrected visual acuity followi ng cataract extraction. Methods-A case series of 880 patients aged 60 years and older undergoing ca taract extraction between 1996 and 1999 was studied. The best corrected vis ual acuity was assessed at discharge from the service and the proportion of patients who achieved a postoperative acuity of greater than or equal to6/ 12 was determined for different age groups. Analysis was also performed aft er exclusion of patients identified preoperatively as having ocular comorbi dity that was thought to limit their final corrected acuity. The odds ratio s for visual outcome were calculated for age using multiple logistic regres sion analysis to adjust for other prognostic factors. Results-A significant age effect was observed, with the proportion of patie nts who had no ocular comorbidity identified preoperatively and who achieve d a visual acuity of greater than or equal to6/12 at discharge decreasing w ith age (p<0.001). In patients with no comorbidity the odds of achieving an acuity of <greater than or equal to>6/12 were 4.6 times higher in the 60-6 9 year age group than in the oldest age group (80+ years). Conclusions-Age is a significant determinant of visual outcome. This has im plications if a points system incorporating an assessment of visual acuity or if visual acuity alone is used to determine the threshold for eligibilit y for cataract surgery.