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Snellen Plastic Eye Chart 20 Feet 22 x 11inches

Snellen Plastic Eye Chart 20 Feet 22 x 11inches

$ 14.87

Availability: 100 in stock
  • MPN: EFP-4407
  • Return shipping will be paid by: Seller
  • Item must be returned within: 30 Days
  • All returns accepted: Returns Accepted
  • Brand: Visionären
  • UPC: Does not apply
  • EAN: Does not apply
  • Manufacturer Part Number: EFP-4407
  • Refund will be given as: Money Back
  • Condition: New

    Description

    Brand New Snellen Plastic Eye Chart 20 Feet 22 x 11inches
    Manufacturer model:
    EFP-4407
    20 Feet Distance Vision Eye Chart.
    Chart with Red Green Lines
    Snellen Wall Eye Chart, 22 in. x 11 in.
    Washable Eye Chart
    Description
    The Snellen eye chart was originally introduced in 1862 by Herman Snellen. 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.
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    Return Policy
    All our products are brand new and sealed. All items qualify for returns within 30 days of receipt.
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