How Do You Administer A Snellen Eye Test?
The Snellen eye test is a common medical test used to determine a patient’s visual acuity. Visual acuity is a quantitative measure of the ability of the eye to identify black symbols against a white background at a set distance. The visual acuity is determined by the smallest size that the patient can read clearly. Ensure that the Snellen eye chart is printed to the proper dimensions. The top line should consist only of only one letter. This letter should be 88 mm tall and the letters should become gradually smaller as you move through the lines. Ensure that the room is well lit, but not in full sunlight, as this will distract from the viewer’s normal eyesight. It is best to use overhead lights, as this will provide an even distribution of light across the room. Ensure that no distractions are present. Try to limit the amount of movement in the room. Position the patient 20 feet away from the Snellen eye chart. Ask the patient to cover one eye with an index card. Have him begin by read
