Purpose: To detect any choroidal thickness (CT) change in patients after alpha-lytic drugs withdrawal that could help in the cataract surgery timing decision.
Methods: Twenty-five eyes of 25 patients (mean age: 76 ± 7 years) under alpha-lytic therapy, and 25 eyes of 25 control subjects (CS) (mean age: 75 ± 7 years) without alpha-lytic therapy, both scheduled for cataract surgery in the fellow eye, were included in this observational, prospective, non-randomized study. All patients underwent EDI-OCT during the first preoperative visit and approximately 1 month (range 28-31 days) after alpha-lytic withdrawal. In the CS group, the OCT during preoperative visit and approximately 1 month after (range 28-31 days) the first examination was performed. Data normality with Kolmogorov-Smirnov test was checked and statistical evaluation with the Wilcoxon-signed rank test was performed.
Results: The mean subfoveal CT was 224 ± 79.7 μm during therapy and 217 ± 70.4 μm after withdrawal; 1.5 mm nasally from the fovea CT was 198 ± 83.8 μm and 194 ± 82.8 μm, respectively; and 1.5 mm temporally from the fovea CT was 217 ± 55.9 μm and 205 ± 54.4 μm, respectively. A statistically significant reduction (p < 0.05) in all the 3 measured CT points was found. In the CS no significant changes were detected (p > 0.05).
Conclusion: No severe floppy iris syndrome was detected at the time of surgery. In these patients, CT decrease could be an important sign for cataract surgery timing decision.
Keywords: Alpha-lytic therapy; Cataract surgery; Choroidal thickness; IFIS; OCT.