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Cover one eye; read the letters aloud. Cover the other eye; read the letters aloud. Ah, the standard eye exam. A few lines of text and the doctor can tell you whether you have poor vision. But let ...
You don't necessarily need to see an eye doctor every year, but it's important to get checked out at some point, Dr. Alice Lorch, a comprehensive ophthalmologist at Mass Eye and Ear, tells Yahoo ...
Across the world, screening programs are important for identifying children who have a need for spectacles but either do not wear any or have the wrong prescription. [14] Often, children who are suspected of having amblyopia are too young to be able to verbally recognize letters on the Snellen chart, making the eye examination challenging. [13]
An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .
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The largest letter on an eye chart often represents an acuity of 6/60 (20/200), the value that is considered "legally blind" in the US. Many individuals with high myopia cannot read the large E without glasses, but can read the 6/6 (20/20) line or 6/4.5 (20/15) line with glasses. By contrast, legally blind individuals have a visual acuity of 6/ ...