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An example of the Landolt C eye chart (also known as the Japanese eye chart). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
The numbers on your eyewear are more important than you think—an optometrist tells us why. The post This Is What Those Numbers on Your Glasses Mean appeared first on Reader's Digest.
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/ ...
Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
Upon the release of the printing press and the mass adoption of literature, larger sectors of the population began to buy into eyewear to assist with reading. Eyewear frames around this time were mainly made of animal bones, horns and fabric; the implementation of wire frames in the 16th century further allowed glasses to be mass-produced.
Sometimes a company or brand logo is more than it first appears. For example, take a look at the hidden meanings or messages embedded in these 12 popular logos below.
Printable version; In other projects Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia. Redirect page. Redirect to: ... Reading glasses.
Because the tops have magnets only at the corners, there's a slight gap in the center between the top and the frame — but it's not noticeable to you as the wearer and barely noticeable to onlookers.