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GB 11533-2011 English PDF (GB11533-2011)

GB 11533-2011 English PDF (GB11533-2011)

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GB 11533-2011: [GB/T 11533-2011] Standard for logarithmic visual acuity charts
This Standard specifies the design criteria, printing specification, use methods, and visual acuity statistical methods, etc. of visual acuity charts. This Standard is applicable to general physical examinations for children, adolescents and adults aged 3 years and above, distant and near optometry and visual impairment screening for physical examinations such as enrollment and recruitment. It can also be used for reference in ophthalmology and optometry clinical aspects.

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