Abstract
Purpose: :
To evaluate the prevalence and characteristics of narrow/closed angle in a Chinese American population who have glaucoma or glaucoma suspicion.
Methods: :
The charts of 165 Chinese American patients were retrospectively reviewed. All patients are 50 years of age or older and had been diagnosed with primary angle closure glaucoma, primary angle open glaucoma, ocular hypertension, glaucoma suspect, or narrow angle suspect in a general ophthalmology practice within San Francisco’s Chinatown District. The anterior chamber angles were graded by a single ophthalmologist based on the Shaffer method. The right eye results were used for data analysis. The percentage of the patients with an average grade of 0 to 2 angles was calculated, and the characteristics of these patients were assessed.
Results: :
A total of 55% (91/165) of patients had grade 0 to 2 angles, among which 79% are female. The median visual acuity of the patients with narrow/closed angles was 20/60, and 41.8% of them have visual acuity equal or better than 20/40. A total of 58.2% (53/91) are hyperopic with spherical equivalent greater than +0.5D, and 13.2% (12/91) are myopic with spherical equivalent greater than - 0.5D. The average intraocular pressure of these patients was 20.2 (+/- 3.8) mmHg. The average cup-to-disk ratio was 0.43.
Conclusions: :
There is a high proportion of narrow/closed angles in our Chinese American population who have glaucoma or glaucoma suspicion. The characteristics of these narrow/closed angle patients are similar to those identified in Singapore and South China population studies.
Keywords: anterior chamber • clinical (human) or epidemiologic studies: prevalence/incidence • intraocular pressure