Causes of Incident Visual Impairment

Causes of incident visual impairment: the Blue Mountains Eye Study.

OBJECTIVE To describe the causes of 5-year incident visual impairment and doubling of the visual angle in a population-based cohort. METHODS Of the 3654 participants aged older than 50 years who participated in the Blue Mountains Eye Study (BMES I, 1992-1994), 543 died and 2335 were reexamined between 1997 and 1999 (BMES II). Visual acuity was measured using a logMAR chart before and after re...

Main causes of visual impairment

Causes of Spelling Weaknesses in Students with Visual Impairment and Teaching Strategies for Spelling Improvement

Background: Spelling is characterized as a basic skill for the children’s writing literacy. A wide range of factors may contribute to the formation and/ or intensification of problems related to teaching writing competencies, so that spellings come with a serious challenge called “invented spelling”. It is also a major concern for teachers and parents of children with visual impairments. Theref...

Age-specific causes of bilateral visual impairment.

OBJECTIVES To describe the age-specific prevalence of common eye diseases causing bilateral visual impairment and estimate the total number of Australians with cause-specific visual impairment. METHODS Cluster-stratified random sample of 5147 residents aged 40 years and older from urban and rural areas and aged-care facilities. Participants completed a standardized interview and eye examinati...

Causes of blindness and visual impairment in Nigeria: the Nigeria national blindness and visual impairment survey.

PURPOSE Determine causes of blindness and visual impairment among adults aged >or=40 years. METHODS Multistage, stratified, cluster random sampling with probability proportional to size procedures were used to identify a nationally representative sample of 15,027 persons >or=40 years of age. Distance vision was measured with a reduced logMAR tumbling E-chart. Clinical examination included a b...