Prevalence and progression of myopic retinopathy in an older population
Section snippets
Materials and methods
The Blue Mountains Eye Study is a population-based survey of common eye diseases in an urban population aged 49 years or older, residing in two postcodes of the Blue Mountains region, west of Sydney, Australia. The survey methods and procedures have been described previously.24 The study was approved by the Western Sydney Area Health Service Human Ethics Committee and written informed consent was obtained from all participants. A baseline eye examination study (BMES I) was performed from 1992
Results
Of the 3654 participants, 71 (1.9%) were excluded because stereo photographs of both eyes were unavailable. The remaining 3583 participants comprised 2024 women (56.5%) and 1559 men (43.5%). Myopia (spherical equivalent refraction ≥–1.0D) was present in at least one eye of 603 participants (16.8%; 331 women and 272 men). High myopia (≥–5.0D) was present in at least one eye of 98 persons (2.7%; 60 women and 38 men). Table 1shows the prevalence of myopia in right eyes by spherical equivalent
Discussion
In this study population, myopic retinopathy prevalence was 1.2%, a figure comparable with other reports: Hu20 (0.95%), Fuchs’18 (0.3–9.6%), and Tokoro19 (2.16%). Its prevalence increased markedly with higher levels of myopia, consistent with studies showing a higher prevalence of pathologic signs at greater axial lengths.2, 28 Our finding of an age-related trend in myopic retinopathy is consistent with data from Curtin.4 Women had a nonsignificant higher prevalence of both high myopia (≥ −5 D)
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