نتایج جستجو برای: severe visual impairment
تعداد نتایج: 786231 فیلتر نتایج به سال:
BACKGROUND A recent estimate by the World Health Organization (WHO) suggests that 161 million persons worldwide have visual impairment, including 37 million blind (best-corrected visual acuity less than 3/60 in the better eye) and 124 million with visual impairment less severe than blindness (best-corrected acuity less than 6/18 to 3/60 in the better eye). This estimate is quoted widely, but be...
PURPOSE To estimate the misclassification rate of self-reported visual disabilities in a hospital-based population with known visual impairment. METHODS Subjects (N=570) were recruited among patients aged 50 years and more and classified to three categories of visual impairment level. The questionnaire was administered to consenting patients through a telephone interview. Data collected from ...
Objectives: Musculoskeletal disorders are the most common childhood problems. The aim of the present study was to investigate the prevalence of head and upper extremity deformities in children with special needs. Materials & Methods: The present research is a descriptive cross-sectional study with stratified sampling method. Ten percent of students with mental retardation, hearing impairment...
BACKGROUND Global and regional prevalence estimates for blindness and vision impairment are important for the development of public health policies. We aimed to provide global estimates, trends, and projections of global blindness and vision impairment. METHODS We did a systematic review and meta-analysis of population-based datasets relevant to global vision impairment and blindness that wer...
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