Snellen Eye Chart Progress Healthcare

Snellen Eye Chart Progress Healthcare

Snellen Eye Chart Comes with metal eyelet for wall hangingThe Snellen Eye Chart measures how well a person can see at various distances. The chart is imprinted with block letters that line-by-line decrease in size, corresponding to the distance at which that line of letters is normally visible. The Snellen Eye Chart is used to test visual acuity with the patient positioned 20 feet from the chart. Visual acuity refers to the clarity or clearness of the vision, a measure of how well a person sees. Visual acuity is typically measured with the use of a standard eye chart called the Snellen chart. It was devised by Dr. Hermann Snellen, a Dutch Ophthalmologist, in 1862. It was originally used at a standard distance of 6 meters. The letters on the Snellen Eye Chart are called Snellen's test type. Each block letter is scientific in design so that at the appropriate distance the letter subtends a visual angle of 5 degrees and each component part subtends an angle of 1 minute. Range Available Clement Clark 3M Chart, AOE or Numerals | Hard Plastic 15*32CM Clement Clark 6M Chart, AOE or Numerals | Hard Plastic 20.5*49CM Graham Field 6M Chart, AOE | Soft Plastic 27*56CM

Non-reflective, matte finish with green and red color bars. 20' distance. 22 x 11. The Snellen eye chart is the familiar chart with the big letter or symbol at the top and progressively smaller letters at the bottom of the chart down to 20/20 or better. This is a chart for measuring visual acuity at a distance - in other words, how well you can see things that are far away.

Graham Field Health Snellen Eye Chart

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Non-reflective, matte finish with green and red color bars. 20' distance. 22 x 11. The Snellen eye chart is the familiar chart with the big letter or symbol at the top and progressively smaller letters at the bottom of the chart down to 20/20 or better. This is a chart for measuring visual acuity at a distance - in other words, how well you can see things that are far away.

Graham Field Health Snellen Eye Chart

Precise, clear, legible; provides 20/800 distance equivalent testing at 14. Pocket Vision Screener Instructions Visual acuity (Va) can be assessed by using the Pocket Vision Screener (not to be confused with the larger Snellen eye chart). The Pocket Vision Screener gives a distance equivalent Va even though the card is held 14 from the patient.

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