Snellen Color Eye Chart Non-Reflective Matte Finish Wall Eye

Snellen Color Eye Chart Non-Reflective Matte Finish Wall Eye Chart 20 Feet
- Snellen Color Eye Chart 22 x 11 Inches, 20 Feet
- The first test designed to check for color blindness while simultaneously administering visual acuity.
- An easy, convenient way to screen for color blindness in a busy medical practice or school.
- Washable Eye Chart with No Reflective Sheet"
The Snellen Eye test uses the idea of a subtended 5 minutes of arc with a 20 foot distance. This became the "standard vision" measurement. Also, Snellen developed the idea of a 5 x 5 grid for a standard for his optotypes. Each optotype must meet certain percentage requirements in this grid before it is used for testing. This helps to make a uniform and equal vision chart. The Snellen eye chart is the basis for many other vision tests.
Country USA
Brand KASHSURG
Manufacturer INDIA
Binding Unknown Binding
ReleaseDate 0000-00-00

Snellen Color Eye Chart Non-Reflective Matte Finish Wall Eye Chart 20 Feet