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The chart was designed by Ian Bailey [5] and Jan E. Lovie-Kitchin at the National Vision Research Institute of Australia. [1] [3] They described their motivation for designing the LogMAR chart as follows: "We have designed a series of near vision charts in which the typeface, size progression, size range, number of words per row and spacings were chosen in an endeavour to achieve a ...
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/ ...
The World Health Organization classifies [1] [2] people with low vision as follows: 1. 6/18 (20/60) [0.5] to 6/60 (20/200) [1.0] 2. 6/60 (20/200) [1.0] to 3/60 (20/400) [1.3] 3. 3/60 (20/400) [1.3] to 1/60 (20/1200) [1.8] readings from left to right are in metres, feet and LogMAR values
Grade 4 anterior chamber angle: open angle between cornea and iris AC 3/4: Grade 3 anterior chamber angle: AC 2/4: Grade 2 anterior chamber angle: AC 1/4: Grade 1 anterior chamber angle: AC 0/4: Grade 0 anterior chamber angle: closed angle between cornea and iris AC/A: Accommodative convergence / Accommodation ratio
Normal" visual acuity (in central, i.e. foveal vision) is frequently considered to be what was defined by Herman Snellen as the ability to recognize an optotype when it subtended 5 minutes of arc, that is Snellen's chart 6/6-metre, 20/20 feet, 1.00 decimal or 0.0 logMAR.
between 2008 and 2012, better performance than 20% of all directors The William E. Wade, Jr Stock Index From January 2008 to December 2012, if you bought shares in companies when William E. Wade, Jr joined the board, and sold them when he left, you would have a -34.7 percent return on your investment, compared to a -2.8 percent return from the ...
From January 2008 to December 2012, if you bought shares in companies when Carol A. Bartz joined the board, and sold them when she left, you would have a -30.5 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
In terms of visual acuity, "foveal vision" may be defined as vision using the part of the retina in which a visual acuity of at least 20/20 (6/6 metric or 0.0 LogMAR; internationally 1.0) is attained. This corresponds to using the foveal avascular zone (FAZ) with a diameter of 0.5 mm representing 1.5° of the visual field (although often ...
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