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.
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 nar- row angle patients（n=55） who underwent laser peripheral iri- dotomy. Ultrasound biomicroscopy was performed in 4 quad- rants of only one eye of each patient 4~6 weeks before and af- ter surgery. The images were randomized and interpreted qual- itatively 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 cri- teria： 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 pro- portion of narrow angle patients with this clinical entity.
