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A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders .
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 ...
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 .
When printed out at this size, the E on line one will be 88.7 mm tall and when viewed at a distance of 20 ft, you can estimate your eyesight based on the smallest line you can read.}} |Source=Own work by uploader, Based
3 Why do you see the speck in your neighbour's eye, but do not notice the log in your own eye? 4 Or how can you say to your neighbour, "Let me take the speck out of your eye", while the log is in your own eye? 5 You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your neighbour's eye.
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