Snellen Type Plastic Eye Chart
Non-reflective plastic, matte finish with green and red color bars.
20' distance. 22" x 11", with eyelet to be hung easily.
The Snellen eye chart is the familiar chart with the big letter or symbol at the top and progressively smaller letters at the bottom of the chart down to 20/20 or better. This is a chart for measuring visual acuity at a distance - in other words, how well you can see things that are far away.