This chart is designed for testing at 4 meters and has an acuity range: 20m to 1.6m (20/100, 6/30 to 20/8, 6/2.4 equiv).

Measures 23 X 35.5 cm and can be wall mounted or used with our SDT-399-LSV Illuminated Cabinet. 

Five symbol tests are instrumental for acuity testing children. Unlike other symbol tests, Patti Pics charts are calibrated from Sloan standards. This means that if the child is tested using Patti Pics symbol tests whilst they are young, when they reach the age to begin using standard Sloan vision tests, there will be no mistaken loss or gain of lines. This makes a smoother transition between the two types of chart, and reduces mistakes.