SNELLEN POCKET EYE CHARTPrestige Eye chart Snellen Pocket Eye ChartChart dimensions 18.5cm x 10cm Designed to measure visual acuity at a distance. Intended to be placed 6 feet away from viewer. Handy pocket-sized eye chart. Easy clean plastic is sanitizeable. Ruler on back with inches and centimeters. Plastic pocket eye chart with pupil gauge. 6 inch ruler on reverse side.? Pocket eye chart? Sanitizeable? Inches/centimeters rulerLetters on chart: E, LT, FPH, OLCF, DHJBS, EPTZO, CFDHJ, LTFPHReadings to the right of letters: 20/200, 20/100, 20/70, 20/50, 20/40, 20/30, 20/25. 20/20