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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Ophthalmic Physiol Opt. 2014 May 29;34(4):479–488. doi: 10.1111/opo.12138

Table 1.

Definitions of visual impairment

International Council of Ophthalmology Maximum VA Minimum VA WHO Maximum VA Minimum VA Acceptable driving standard (Europe)
Snellen logMAR Snellen LogMAR Snellen logMAR Snellen logMAR Snellen logMAR
Normal 0.8 6/7.5 0.1
Mild vision loss <0.8 6/7.5 0.1 0.3 6/18 0.48 ≥0.5 6/12 0.3
Moderate vision loss <0.3 6/18 0.48 0.125 6/48 0.9 Low vision category 1 <0.3 6/18 0.48 0.1 6/60 1.0
Severe vision loss <0.125 6/48 0.9 0.05 3/60 1.3 Low vision category 2 <0.1 6/60 1.0 0.05 3/60 1.3
Profound vision loss <0.05 3/60 1.3 0.02 6/300 1.7 Blindness category 3 <0.05 3/60 1.3 0.0167 6/360 1.78
Near total vision loss (near blindness) <0.02 6/300 1.7 NLP (sic) Blindness category 4 <0.0167 6/360 1.78 LP
Total vision loss (total blindness) NLP Blindness category 5 NLP