HOME >> Ophthalmology & Optometry >> Conversion Table for Representation of Visual Acuity

Conversion Table for Representation of Visual Acuity

Visual Acuity values are represented in decimal, fraction (in feet or meters) and log MAR. Use the table below for conversion between them.

20 ft6 mDecimal4 mLog MAR
20 / 6306 / 1900.0324 / 125+1.5
20 / 5006 / 1500.044 / 100+1.4
20 / 4006 / 1200.054 / 80+1.3
20 / 3206 / 950.064 / 63+1.2
20 / 2506 / 750.084 / 50+1.1
20 / 2006 / 600.14 / 40+1.0
20 / 1606 / 480.1254 / 32+0.9
20 / 1256 / 380.164 / 25+0.8
20 / 1006 / 300.24 / 20+0.7
20 / 806 / 240.254 / 16+0.6
20 / 636 / 190.324 / 12.5+0.5
20 / 506 / 150.44 / 10+0.4
20 / 406 / 120.54 / 8+0.3
20 / 326 / 9.50.634 / 6.3+0.2
20 / 256 / 7.50.84 / 5+0.1
20 / 206 / 61.04 / 40
20 / 166 / 4.81.254 / 3.2-0.1
20 / 12.56 / 3.81.64 / 2.5-0.2
20 / 106 / 32.04 / 2-0.3