Prophylactic ocular hypotensives before Nd:YAG laser posterior capsulotomy

The study groups under comparison seem to be similar at the start of the study and there is no apparent selection bias or probability of confounding, but randomization and blinding could have made the interpretation of results more reliable. If complete blinding was not feasible, the observer doing the applanation tonometry could have been masked. In such comparative studies, the sample size calculation should be elaborated a little more and the statistical test applied to analyze the data should be mentioned.