| Title | Plateau iris in Asian subjects with primary angle closure glaucoma. | | Author(s) | Kumar RS, Tantisevi V, Wong MH, Laohapojanart K, Chansanti O, Quek DT, Koh VT, MohanRam LS, Lee KY, Rojanapongpun P, Aung T | | Institution | Singapore National Eye Centre and Singapore Eye Research Institute, Singapore. | | Source | Arch Ophthalmol 2009 Oct; 127(10):1269-72. | | MeSH | Adult
Aged
Aged, 80 and over
Asian Continental Ancestry Group
Ciliary Body
Cross-Sectional Studies
Eye Abnormalities
Female
Glaucoma, Angle-Closure
Gonioscopy
Humans
Intraocular Pressure
Iridectomy
Iris
Laser Therapy
Male
Microscopy, Acoustic
Middle Aged
Prevalence
Prospective Studies
Singapore
Thailand
Tonometry, Ocular
Trabecular Meshwork
| | Abstract | OBJECTIVE: To determine the prevalence of plateau iris in Asian eyes with primary angle closure glaucoma (PACG) using ultrasound biomicroscopy (UBM).
METHODS: In this cross-sectional observational study, subjects older than 40 years with PACG who had a patent laser peripheral iridotomy underwent UBM in 1 eye. Ultrasound biomicroscopy images were qualitatively analyzed using standardized criteria. Plateau iris in a quadrant was defined by anteriorly directed ciliary body, absent ciliary sulcus, steep iris root from its point of insertion followed by a downward angulation, flat iris plane, and irido-angle contact. At least 2 quadrants had to fulfill these UBM criteria for an eye to be classified as having plateau iris.
RESULTS: One hundred eleven subjects (70 from Singapore, 41 from Thailand) with PACG were recruited. The mean (SD) age was 65.6 (8.1) years, and 63.9% were female. Based on standardized UBM criteria, plateau iris was found in 36 of 111 eyes (32.4%; 95% confidence interval, 24.4%-41.6%). In these 36 eyes, quadrant-wise analysis showed 66.7% had plateau iris in 2 quadrants; 22.2%, in 3 quadrants; and 11.1%, in all quadrants.
CONCLUSIONS: About 30% of PACG eyes with a patent laser peripheral iridotomy were found to have plateau iris on UBM, highlighting the importance of non-pupil block mechanisms in Asian individuals. | | Language | eng | | Pub Type(s) | Journal Article
Research Support, Non-U.S. Gov't
| | PubMed ID | 19822841 |
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