Visual acuity changes in the preoperative period in patients undergoing cataract surgery.

Objective: This study quantifies change in best visual acuity (BVA) over the preoperative period and assesses factors associated with postoperative outcomes.
Design: Retrospective chart review conducted at a single institution.
Participants: A total of 691 patients underwent cataract surgery and had a preoperative assessment 0-30 days prior to surgery following their surgical evaluation.
Methods: Baseline demographics and past medical and clinical data were collected through electronic medical record query. BVA was noted at initial surgical evaluation, preoperative assessment, and nearest postoperative assessment.
Results: A total of 691 patients (911 eyes) were included with mean BVAs at the initial evaluation, preoperative assessment, and postoperative assessment of 68.3 ± 16.8, 64.6 ± 18.5, and 81.1 ± 12.0 ETDRS letters, respectively. Mean BVA was significantly higher postoperatively compared with the preoperative assessment and initial evaluation (p < 0.0001). There was a mean of 53.8 days between initial surgical evaluation and surgery date and a mean of 49.9 days between the preoperative assessment and initial surgical evaluation. The mean interval between the preoperative assessment and surgery was 11.7 days. In the preoperative period, 9.1% of eyes experienced worsening of BVA by >3 lines and 0.9% experienced improvement of BVA by >3 lines. Time to surgery was significantly associated with change in postoperative BVA (effect size, -0.03 ETDRS letters; p = 0.015) but was not significant on multiple linear regression. BVA at initial evaluation, glaucoma, and glaucoma surgery were all significantly associated with postoperative outcomes.
Conclusion: Most eyes experienced stable vision in the preoperative period for cataract surgery. On average, patients with high BVAs at the time of initial surgical evaluation may be able to defer surgery without the risk of poorer surgical outcomes.
(Copyright © 2023 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.)