Difference between revisions of User:Divenal/sandbox
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An alternative representation of acuity is "logMAR" ("log<sub>10</sub> Minimum Angle of Resolution"). This has a bigger-is-worse direction. | An alternative representation of acuity is "logMAR" ("log<sub>10</sub> Minimum Angle of Resolution"). This has a bigger-is-worse direction. | ||
* 0.0 corresponds to "20/20" | * 0.0 corresponds to "20/20" (1.0 or 1 arc-minute) | ||
* 1.0 is "20/200" | * 1.0 is "20/200" (0.1 or 10 arc-minutes) | ||
* -0.3 is "20/10" | * -0.3 is "20/10" (2.0 or 0.5 arc-minutes) | ||
On a Snellen chart, one useful way to think of the labels on the letter rows is as "the distance at which they subtend 5 arc-minutes". | On a Snellen chart, one useful way to think of the labels on the letter rows is as "the distance at which they subtend 5 arc-minutes". | ||