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Snellen Eye Chart 22 x 11 Inch with Snellen Pocket Eye Chart Pack of 2 Charts

4.6 (2) Write Review
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$18.53

$ 8 .99 $8.99

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  • 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 5x5 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.
  • Snellen Pocket Eye Chart with Red Green Lines and Scale.
  • Designed to measure visual acuity at a distance.
  • Intended to be placed 6 feet away from viewer.


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 5x5 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.


S Presley
Reviewed in the United States on June 16, 2019
Great assessment tool
Baldy
Reviewed in the United States on May 13, 2019
Nice chart