Sample size
The sample size was determined by the results of the preliminary investigation before this RCT. We hypothesized that the cross-sectional area in the KDB group would be higher than the microhook group. The sample size that would provide 80% power to prove the superiority of the KDB group for the incisional cross-sectional area was 25 eyes for each group with an effect size of 0.83. Therefore, we planned to recruit 60 eyes to account for a 15% dropout rate.