Multiple Applications - The red and green color bars on the Snellen chart are perfect for an easy and helpful color vision test. Perfect for optometrists, eye doctors, med students, offices, schools, and daily family members' vision tests
The 22" x 11" inch standard vision chart requires a distance of 20 feet from the observer for visioning testing. Perfect for optometrists, children, students, homes, offices, and schools.
Made of PVC eco-friendly waterproof material with a matte finish avoiding reflection and glare effects. The colored lines printed on the eye chart test for blue, red and green color blindness.