WHO | Visual impairment and blindness - WHO | World Health Organization

WHO | Visual impairment and blindness - WHO | World Health Organization

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日期:2026-05-29
There are 4 levels of visual function, according to the International Classification of Diseases -10 (Update and Revision 2006): normal vision moderate visual impairment severe visual impairment blindness. Moderate visual impairment combined with severe v...看更多