Plateau Iris in Whites versus Asians
摘要
Purpose:To evaluate the prevalence of plateau iris diagnosed by ultrasound biomicroscopy after laser peripheral iridotomy in Whites as compared to Asians in a U.S.clinic setting.Methods:This was a prospective,observational study of narrow angle patients(n=55) who underwent laser peripheral iridotomy.Ultrasound biomicroscopy was performed in 4 quadrants of only one eye of each patient 4～6 weeks before and after surgery.The images were randomized and interpreted qualitatively by a single observer.Plateau iris was diagnosed in eyes with persistent appositional angles after laser peripheral iridotomy when at least 2 quadrants fulfilled the following criteria:1.The ciliary process was directed anteriorly.2.The ciliary sulcus was absent.3.The central iris plane was flat.Results:Twenty eight subjects (50.1%) were Whites,and 27 subjects (49.0%) were Asians.Plateau iris was assessed in 18 subjects(32.7%):9 of 28 Whites (32.1%) and 9 of 27 Asians (33.3%).The proportion of plateau iris did not differ between Whites and Asians(P > 0.99).Conclusion:The prevalence of plateau iris did not differ between Whites and Asians.Both groups had a substantial proportion of narrow angle patients with this clinical entity.
