Standard logarithmic far visual acuity chart

Date of publication:2012-7   Press: People's Medical Publishing House   Author:Ophthalmological Hospital Affiliated to Wenzhou Medical College   Pages´╝Ü4  
Summary

"The standard logarithmic distance vision table" according to the people's Republic of China national standard GB11533-2011 production. "The standard logarithmic far visual acuity chart" provides 4 different visual target array layout, in order to avoid the memory effect of examination, and enhance the accuracy of repeated measurements. "The standard logarithmic distance vision table" using artificial lighting, visual acuity chart surface illumination should be not less than 300 lux (LX), and should be uniform, constant, no reflection, not dazzling, to ensure that the vision examination result is accurate and reliable.
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