For example, the proportion of vision impairment attributable There is substantial variation in the causes between and within countries according to the availability of eye care services, their affordability, and the eye care literacy of the population. Globally, the leading causes of vision impairment are: Population growth and ageing are expected to increase the risk that more people acquire vision impairment. With regards to near vision, rates of unaddressed near vision impairmentĪre estimated to be greater than 80% in western, eastern and central sub-Saharan Africa, while comparative rates in high-income regions of North America, Australasia, Western Europe, and of Asia-Pacific are reported to be lower than 10% (2). In terms of regional differences, the prevalence of distance vision impairment in low- and middle-income regions is estimated to be four times higher than in high-income regions (1). Retinopathy (3.9 million) (1), as well as near vision impairment caused by unaddressed presbyopia (826 million) (2).
This 1 billion people includes those with moderate or severe distance vision impairment or blindness due to unaddressed refractive error (88.4 million), cataract (94 million), age-related macular degeneration (8 million), glaucoma (7.7 million), diabetic In at least 1 billion – or almost half – of these cases, vision impairment could have been prevented or has yet to be addressed. Globally, at least 2.2 billion people have a near or distance vision impairment. Spectacles or white canes), and whether the person experiences problems with inaccessible buildings, transport and information. This includes for example, the availability of prevention and treatment interventions, access to vision rehabilitation (including assistive products such as Near visual acuity worse than N6 or M.08 at 40cm.Ī person’s experience of vision impairment varies depending upon many different factors.Blindness – visual acuity worse than 3/60.Severe – visual acuity worse than 6/60 to 3/60.Moderate – visual acuity worse than 6/18 to 6/60.Mild – visual acuity worse than 6/12 to 6/18.The International Classification of Diseases 11 (2018) classifies vision impairment into two groups, distance and near presenting vision impairment.
0 kommentar(er)
