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discussed in our manuscript. The quantitative angle parameters measured by anterior segment optical coherence tomography found some angle widening in iridoplasty eyes, but this did not translate into effective gonioscopic widening. By effective, we mean that the filtering portion (posterior trabecular meshwork) of the angle was seen only in 35.0% of the angle quadrants despite retreatment. This finding could partly be owing to racial differences in our study population, who were subjects from Southeast Asia (predominantly Chinese). Angle crowding in Chinese subjects seems to be associated with a thicker iris root, presence of a plateau configuration, and possibly a combination of other anatomic factors. To summarize, it was reasonable to conclude from our data that the effectiveness of iridoplasty in our study subjects was inadequate both in terms of intraocular pressure reduction and angle widening. We urge the scientific community to explore and execute further studies on iridoplasty and publish long-term data on this subject.