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2. File:ETDRS Chart R.svg - Wikipedia

   en.wikipedia.org/wiki/File:ETDRS_Chart_R.svg

   Chart and optotype dimensions in millimeters precisely as specified by Ferris et al. (1982). LogMAR and VAR values after Baliey & Lovie (2013). Note: meters/feet not a direct conversion, but rather in Snellen equivalents (1 meter = 5 feet).

3. LogMAR chart - Wikipedia

   en.wikipedia.org/wiki/LogMAR_chart

   Snellen chart. The Snellen chart, which dates back to 1862, is also commonly used to estimate visual acuity.A Snellen score of 6/6 (20/20), indicating that an observer can resolve details as small as 1 minute of visual angle, corresponds to a LogMAR of 0 (since the base-10 logarithm of 1 is 0); a Snellen score of 6/12 (20/40), indicating an observer can resolve details as small as 2 minutes of ...

4. Near visual acuity - Wikipedia

   en.wikipedia.org/wiki/Near_visual_acuity

   Near visual acuity or near vision is a measure of how clearly a person can see nearby small objects or letters.Visual acuity in general usually refers clarity of distance vision, and is measured using eye charts like Snellen chart, LogMAR chart etc. Near vision is usually measured and recorded using a printed hand-held card containing different sized paragraphs, words, letters or symbols.

5. MNREAD acuity chart - Wikipedia

   en.wikipedia.org/wiki/MNREAD_acuity_chart

   The MNREAD chart consists of sentences with print size decreasing by 0.1 log unit steps, from 1.3 logMAR (Snellen equivalent 20/400 at 40 cm) to −0.5 logMAR (Snellen equivalent 20/6). [4] Charts are available in many languages. It allows near visual acuity recording in logMAR notation, Snellen notation or M-units. [5]

6. File:ETDRS Chart 1.svg - Wikipedia

   en.wikipedia.org/wiki/File:ETDRS_Chart_1.svg

   LogMAR and VAR values after Baliey & Lovie (2013). Note: meters/feet not a direct conversion, but rather in Snellen equivalents (1 meter = 5 feet). Date: 10 January 2021: Source: Own work, after Ferris FL, Kassoff A, Bresnick GH, Bailey IL (1982). "New Visual Acuity Charts for Clinical Research". American Journal of Ophthalmology 94 (1): 91–96.

7. File:Snellen chart.svg - Wikipedia

   en.wikipedia.org/wiki/File:Snellen_chart.svg

   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

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9. Sloan letters - Wikipedia

   en.wikipedia.org/wiki/Sloan_letters

   Sloan letters, designed by Louise Sloan in 1959, are a set of optotypes used to test visual acuity generally used in Snellen charts and logMAR charts. This set of optotypes consists of ten specially formed "letters", C, D, H, K, N, O, R, S, V and Z. [ 1 ] These letters, unlike the ones used in older Snellen charts, are designed to give acuity ...