Difference between revisions of Visual acuity
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(→Reading a Snellen chart: Moving some text here from the optic-related-math page.) |
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Visual acuity for [[myopes]] is typically measured at [[distance vision|20 feet or 6 meters]]. Lens or mirror tricks may be used to change the effective test distance in a smaller room. Visual acuity for [[hyperopes]] is typically measured at 36cm, and a [[presbyope]] would be measured at both distances. | Visual acuity for [[myopes]] is typically measured at [[distance vision|20 feet or 6 meters]]. Lens or mirror tricks may be used to change the effective test distance in a smaller room. Visual acuity for [[hyperopes]] is typically measured at 36cm, and a [[presbyope]] would be measured at both distances. | ||
With text that we are familiar with, the brain may clear up that text more than our vision would actually allow. | |||
==Reasons differing visual acuity== | ==Reasons differing visual acuity== | ||