title: [Comparison of simple methods to screen predisposing eye of primary angle-closure glaucoma].
abstract: 6,584 population over 40 years old in Canton universities and factories were screened for the predisposing eyes of primary angle-closure glaucoma (PACG). In the screening, three methods for the measurement of anterior chamber depth were used and compared and the critical limits of two simple ones of them [peripheral anterior chamber depth (PACD) and oblique illumination test with a flashlight] were evaluated. It was found that the incidence of PACG is as high as 10.0% in eyes with axial anterior chamber depth (AACD) < or = 2.0 mm, it is 6.7% in eyes with peripheral anterior chamber depth (PACD) < or = 1/4 corneal thickness (CT) and is 6.9% in eyes with iris light band ratio (ILBR) < or = 1/4. Also, we found that the incidence of PACG is as high as 77.8% in eyes with AACD < or = 1.6 mm and 100.0% in, AACD < or = 1.4 mm. The authors propose that PACD < or = 1/4 CT and ILBR < or = 1/4 can be the critical values of the two methods for the primary step of PACG screening.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou.
authors.forename: T
authors.initials: T
authors.lastname: Ye
authors.forename: W
authors.initials: W
authors.lastname: Mao
authors.forename: D
authors.initials: D
authors.lastname: Lu
mesh_terms: D000328:Adult; D000867:Anterior Chamber / Q000473:pathology*; D002681:China / Q000453:epidemiology; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000453:epidemiology / Q000473:pathology / Q000517:prevention & control*; D006801:Humans; D015994:Incidence; D008297:Male; D008403:Mass Screening; D012680:Sensitivity and Specificity