Yuansheng Yuan

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PURPOSE Describe the prevalence of visual impairment/blindness among older adults in rural populations in China. DESIGN Population-based, cross-sectional study. PARTICIPANTS We evaluated 45 747 adults > or =50 years of age. METHODS Geographically defined cluster sampling was used in randomly selecting a cross-section of residents from a representative(More)
PURPOSE The purpose of the study was to describe the prevalence, severity, and associated risk factors for pterygium in a population-based sample of rural residents of the Bai minority population in rural Dali, China. METHODS A population-based survey of Chinese Bai Nationality aged ≥50 years from randomly selected block groups in southwestern China was(More)
PURPOSE This study aimed to assess the prevalence, awareness, treatment, and control of hypertension and their associated factors among Bai ethnic population in the rural China. METHODS A population-based survey was conducted in 2010 with a randomly cluster sampling in rural communities in Dali, southwest China. A total of 2133 adults aged 50 or above(More)
PURPOSE. To evaluate the potential neuroprotective effects of C-type natriuretic peptide (CNP) on rat retinal ganglion cells (RGCs). METHODS. Cultured adult rat retinal cells were treated with vehicle, CNP, or atrial natriuretic peptide (ANP), followed by cytotoxic insults (glutamate, TNFalpha, or withdrawal of trophic factor). RGC survival was analyzed by(More)
PURPOSE To investigate the prevalence and visual acuity (VA) outcomes of cataract surgery in rural populations throughout China. DESIGN Population-based, cross-sectional study. PARTICIPANTS Forty-five thousand seven hundred forty-seven adults 50 years of age and older. METHODS Geographically defined cluster sampling was used in randomly selecting a(More)
PURPOSE We evaluated the prevalence of glaucoma in adults of the Bai Nationality populations in rural China. METHODS A population-based survey of Chinese Bai Nationality aged ≥50 years from randomly selected block groups in southwestern China was conducted. Eligible persons were invited to local examination sites for a complete ophthalmic examination.(More)
PURPOSE To determine the prevalence of myopia and ocular biometry in population-based samples of ethnic Yi and Han people living in an inland rural community in China. METHODS A random cluster sampling strategy was used to select ethnic Han and Yi adults aged 50 years or older living in Yunnan. Refractive error was determined by subjective refraction and(More)
PURPOSE To investigate the prevalence and visual acuity (VA) outcomes of cataract surgery in adults of the Bai Nationality populations in rural China. METHODS We conducted a population-based cross-sectional survey (from randomly selected block groups) of Chinese Bai Nationality aged ≥50 years in southwestern China. Presenting visual acuity (PVA), best(More)
PURPOSE To determine the 5-year cumulative incidence of pterygium and its associated predictors in the Bai Chinese population in a rural community. METHODS This population-based study included 2133 subjects aged 50 years or older in 2010 and was repeated in 2015 with 1520 subjects (71.3%) participating in the follow-up examination. Participants with(More)
PURPOSE To assess the prevalence and causes of visual impairment in the elderly Bai ethnic group in rural China. METHODS Random cluster sampling was used to identify the Bai ethnic group 50 years and older living in the Dali county of Yunnan, China. Presenting visual acuity (PVA) and best-corrected visual acuity (BCVA) were measured using the Early(More)