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S. Sawaguchi, Y. Nakamura, H. Sakai, A. Tomidokoro, G. Tomita, A. Iwase, T. Yamamoto, H. Abe, M. Araie; The Prevalence of Primary Open Angle Glaucoma and Secondary Glaucoma in a Rural Island in Southwest Japan. Invest. Ophthalmol. Vis. Sci. 2009;50(13):430.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the prevalence of primary open angle glaucoma (POAG) and secondary glaucoma (SG) in Kumejima island in southwest Japan.
Of all 4682 residents aged 40 years or older, 3762 (81.2% participation rate) underwent ophthalmic examination including slit-lamp examination, applanation tonometry, gonioscopy, fundus photography, and visual field testing. Glaucoma and its suspect were diagnosed according to the ISGEO classification scheme.
Prevalence of POAG, POAG suspect, SG and SG suspect was 3.98 (95% confidence interval, 3.4-4.7)%, 2.58(2.1-3.1)%, 0.74 (0.5-1.1)%, and 0.29(0.2-0.5)%, respectively. Of 150 POAG patients, 123 (82%) patients had IOP equal or less than 21 mmHg and classified as normal tension glaucoma (NTG). Of 28 SG subjects, 14 (50%) were exfoliation glaucoma. Prevalence of NTG in 40-49, 50-59, 60-69, 70-79, and 80 years or older was 1.37(0.8-2.3)%, 2.09(1.3-3.3)%, 4.22(2.9-6.1)%, 4.12(3.0-5.7)%, and 6.61(4.6-9.3)%, respectively.
In a rural southwest island of Japan, although prevalence of primary angle closure glaucoma has been reported to be noticeably higher than that in central Japan, prevalence of POAG and SG was similar to those in central Japan. NTG was most prevalent type of glaucoma and was age dependent, as same as in central Japan.
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