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These notations serve as an indication of the approximate relationship between recordings of distant and near vision and point type sizes. Note A.M.A., Jaeger, and Metric are Near Vision measurements.
Distant Snellen A.M.A. Jaeger Metric % Central Visual
Efficiency for Near
Point
20/20 (ft.) 14/14 (in.) 1 0.37 (M.) 100 3
20/30 14/21 2 0.50 95 5
20/40 14/28 4 0.75 90 6
20/50 14/35 6 0.87 50 8
20/60 14/42 8 1.00 40 9
20/80 14/56 10 1.50 20 12
20/100 14/70 11 1.75 15 14
20/120 14/84 12 2.00 10 18
20/200 14/140 17 3.50 2 24
12.5/200 14/224 19 6.00 1.5  
8/200 14/336 20 8.00 1  
5/200 14/560        
3/200 14/900