Snellen Linear Spacious Eye Chart with Red Green Bar Visual Acuity Test at 6m/20ft, 12" x 18"

• Visual acuity test device: this device allows you to check visual acuity at 20 feet distance.
• LARGE SIZE: With a size of 323 x 35.5 cm, this eye board is suitable for use in practices and clinics.
• High Contrast: The red and green bars on a black background provide high contrast for precise visual acuity determination.
• Snellen Diagram The line chart is based on the Snellen principle for standardized measurement of vision.
• Durable: The robust plastic construction ensures a long service life for professional use.
• Perfect for opticians, students, offices and schools.

This chart uses true Snellen optotypes for vision testing. The optotypes C, D, E, F, L, O, P, T are characterized by defined serifs on each letter, making them unique to Snellen. These optotypes also fit into a 5×5 grid, also designed by Herman Snellen. This Snellen eye chart also includes Snellen equivalents on the sides for accurate visual recording. This traditional Snellen chart is ideal for school visual examinations as it also includes a red and green bar for colour vision testing. Snellen eye chart for vision testing on 20 feet visual acuity range 20/100 to 20/16.