Illuminated Tumbling-E Chart 10 ft. Distance. Visual Acuity Testing. E’s Eye Examination Chart
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Tumbling-E Chart 10′
Ophthalmological chart used to measure a patient’s visual acuity, similar to the standardize Snellen eye chart that most people use for testing; however it contains a series of letter E’s instead of the variety of letters included in the Snellen chart. White translucent plastic chart features non-glare black letter E’s. Packaged: 1 each.
Made from thick plastic to prevent creases and tears, with matte finish to limit reflections and glare. These letter E’s are rotated at 90 degrees requiring the individual taking the test to properly identify the direction of each version of the E’s “fingers” using their hands to point up, down, right or left. This eye chart only measures a person’s visual acuity and cannot be used to determine other vision issues such as color blindness, depth perception or disorders.
HOW THE TEST IS PERFORMED
The tumbling-e chart is typically used to test individuals who are unable to properly communicate. While looking at the letter on a chart or projection, the person states whether the E is facing up, down, left, or right. With this chart, there is a one in four chance a person can guess the direction, therefore it is recommended they correctly indicate the orientation of most letters of the same size (e.g. five out of six).
The tumbling-e chart is great for use with patients who do not know their alphabet, people who are illiterate or perhaps individuals who suffer from a handicap. These patients simply have to gesture the direction they see the optotype since there is only one. This optotype is place in four different directions; up, down, left, and right. The Tumbling E chart is considered highly reliable and accurate.
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