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). Two smaller groups 5M to 1.6M for repetitive testing (20/25, 6/7.5 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. 

PV numbers are an alternative vision test to Sloan, Snellen, Patti Pics, Landolt "C," and Tumbling "E" tests. It is designed for vision testing in several different languages (can be used across the globe) and for several types of patients. This test is very useful for mute patients and for children who may be preliterate but may know their numbers.