EASY TO USE: snellen vision chart allows you to assess your vision from the comfort of your home because it is very quick and easy to use.
HIGH QUALITY MATERIAL: AISITESY quartz dial is made of high quality PVC material, extra thick and tear resistant, clear and non-reflective printing, waterproof and easy to clean.
PERFECT SIZE: The Snellen wall chart is 14 x 9 inches and this Snellen vision chart helps measure vision at 10 feet from the observer. 20 feet is equivalent to testing at 10 feet (3 meters).
COLOR BARS: The vision chart includes red and green color bars for simple and useful color vision testing.
24 hours customer service:If you have questions you can contact customer service, we will have a professional team to help you solve the problem!