Ophthalmology
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Comparative Study
What is lost by digitizing stereoscopic fundus color slides for macular grading in age-related maculopathy and degeneration?
To compare 35-mm stereoscopic slide transparencies with digitized nonstereoscopic images (resolution 1024x768 pixels) for grading abnormalities in age-related maculopathy (ARM) and age-related macular degeneration (AMD). ⋯ Because of the close agreement for most categories between the grading of stereoscopic color slides and digitized images, digitized nonstereoscopic color images prove to be useful for grading ARM and AMD.
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Few population-based data on the prevalence and causes of visual impairment are available from East Asia. The purpose of this study was to determine the prevalence and causes of visual impairment in an elderly Chinese population in Taiwan. ⋯ The rate of blindness and low vision is close to that reported for other developed countries. The high frequency of myopic macular degeneration as a major cause of visual loss, however, is not observed in European-derived populations. Specific prevention or low-vision rehabilitation programs should be developed for the elderly Chinese population.
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To report a new treatment for acquired periodic alternating nystagmus in which medical therapy with baclofen was not tolerated. ⋯ Simultaneous bilateral retroequatorial horizontal rectus recessions may be an effective treatment for intractable acquired periodic alternating nystagmus.
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Comparative Study
Four-year incidence of visual impairment: Barbados Incidence Study of Eye Diseases.
To describe the 4-year incidence of visual impairment and causes of blindness among black participants of the Barbados Eye Studies. ⋯ The incidence of visual impairment was high in this Afro-Caribbean population, particularly in older age groups, indicating the public health significance of visual loss for this and similar black populations. Cataract, OAG, and DR were among the leading causes of incident blindness, paralleling their high prevalence in this population.