[Prevalence and causes of pain after cataract surgery: Comparison of 1st and 2nd eyes].

INTRODUCTION: In our practice, patients undergoing bilateral cataract surgery complain of more significant pain after the 2nd eye surgery. The goal of this study was to compare postoperative pain between the 1st and 2nd eyes with cataract surgery under topical anesthesia and to identify the causes of this pain.

PATIENTS AND METHODS: We conducted a prospective observational study between May and September 2015. We included 69 consecutive adults scheduled for bilateral cataract surgery under topical anesthesia within 2 months by the same surgeon. A self-assessment questionnaire of anxiety (the Amsterdam Preoperative Anxiety and Information Scale [APAIS]) was completed before each procedure. Postoperative pain was assessed by the visual analogue scale (VAS) in the recovery room.

RESULTS: Among the 69 included patients (mean age: 70±1.3 years), 13 (19%) experienced more pain after the 2nd eye procedure. The median VAS was 0 (EI: 0-1) after the first eye versus 0 (EI: 0-2) after the second eye (P=0.836). The patients with the most pain after the second eye surgery had a median anxiety score of 5 (EI: 4 to 9.5), which was comparable to those without pain (P=0.589). On bivariate analysis, women had more pain after second eye surgery (27%) than men (4%) (P=0.026). However, this association lost its significance when the analysis was adjusted for the level of anxiety (adjusted OR 7.7, 95% CI [0.91; 64.6]). In fact, women were more anxious [median anxiety score of 6 (EI: 4 to 8.5)] before 2nd eye surgery than men [median score: 4 (EI: 4-6); P=0.013].

DISCUSSION: Pain levels appeared to be very moderate on both sides when measured postoperatively, as opposed to statements often made in the immediate postoperative period. There is a discrepancy with the literature data. However, each study had small sample sizes.

CONCLUSION: We did not find any significant difference in pain between 1st and 2nd eye cataract surgery under topical local anesthesia. While postoperative pain appeared greater among women, we have noted the possible influence of anxiety, which could justify specific preoperative support.