Refractive changes following cataract surgery: the Blue MountainsEye Study.

摘要

This study aimed to assess refractive changes following cataractsurgery in subjects attending the Blue Mountains Eye Study baselineexaminations in 1992-1994 (3654 residents aged 49+ years),with 2335 (75.1%) survivors re-examined after 5 years.Participants underwent a standardized subjective refraction. Historyof cataract surgery was confirmed at examination and lens photographgrading. During follow up, 151 persons had cataract surgery (60bilateral, 91 unilateral). After exclusions, data from 198 eyes(93 right, 105 left) were analysed. The proportions of eyes achievingpostoperative spherical equivalent refraction (SER) -0.25to +0.25 D, -0.50 to +0.50 D, -0.75to +0.75 D and -1.00 to +1.00 D,were 32%, 44%, 60% and 74%,respectively. The magnitude and direction of refractive changesfollowing cataract surgery were related to the preoperative refraction.Myopic eyes had a hyperopic shift (mean +2.76 D),hyperopic eyes a myopic shift (mean -1.77 D) andemmetropic eyes recorded little change (mean -0.13 D).Astigmatism (>/=1.00 D cylinder) increased slightlypostoperatively, from 47% to 56%, mostly 'againstthe rule' but with less oblique astigmatism. These findingsindicate satisfactory refractive outcomes following current cataractsurgery in a random older population.