Anterior segment optical coherence tomography for imaging the anterior chamber after laser peripheral iridotomy.

PURPOSE To evaluate changes in anterior segment morphology by anterior segment optical coherence tomography (OCT) and gonioscopy before and after laser peripheral iridotomy (LPI). DESIGN Prospective comparative observational case series. METHODS Ten eyes of 10 patients with narrow angles were enrolled in the study. Angles were assessed by gonioscopy and anterior segment OCT pre- and post-LPI. The angle opening distance at 500 microm, angle recess area at 500 microm and 750 microm, and trabecular-iris space area at 500 microm and 750 microm were compared pre- and post-LPI. RESULTS The mean gonioscopy grade increased significantly from 0.56 to 2.6 (P < .001). All OCT parameters increased significantly post-LPI. CONCLUSIONS Changes in the anterior chamber angle morphology post-LPI can be imaged and objectively quantified by anterior segment OCT.