| Brand | Dukal |
|---|---|
| Unit Count | 1 pcs |
| Material | Plastic |
| Size | One Size |
Illuminated Snellen Eye Chart 20 ft. Distance. Visual Acuity Testing. Eye Examination Chart
$106.69
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Description
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SNELLEN EYE CHART 20′
Used to measure visual acuity by determining the level of visual detail that a person can discriminate. White translucent plastic chart features non-glare black letters of the alphabet. Packaged: 1 each.
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HIGH QUALITY
Made from thick plastic to prevent creases and tears, with matte finish to limit reflections and glare. It usually shows 11 rows of capital letters. The first line has very large letters. Each row after that has increasing numbers of letters that are smaller in size.
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HOW THE TEST IS PERFORMED
This test may be done in a health care provider’s office, a school, workplace, or elsewhere. You will be asked to remove your glasses or contact lenses and stand or sit 20 feet (6 meters) from the snellen eye chart. You will keep both eyes open. You will be asked to cover one eye with the palm of your hand, a piece of paper, or a small paddle while you read out loud the smallest line of letters you can see on the chart.
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HOW TO USE
When you visit the eye doctor for a checkup, you may be asked to read an snellen eye chart. The chart measures your visual acuity, or sharpness of vision. If you don’t wear glasses or contacts, your eye doctor will use the results to find out whether you need them. If you already wear corrective lenses, the test results will tell your doctor if your glasses or contacts prescription needs to change.
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