Difference between revisions of Visual acuity

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[[File:20-20novelgames.PNG|thumb|20/20 vision as diagnosed by [https://www.novelgames.com/en/eagleeye/ Eagle Eye on Novel Games]]]

Visual acuity (VA) is the measurement of how well the entire vision system can recognize what it sees. Formally, it is defined as the reciprocal of the smallest angle that the visual system can resolve.

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==Reasons for differing visual acuity==

[[~~Refraction~~]], which causes [[blur]] and [[double vision]], is only one factor of visual acuity. Various medical conditions can cause physical blockage/dispersion of light in the eye, problems detecting light in the eye, or problems with the visual processing that turns a series of electrochemical signals into a picture in our mind's eye. See an [[optometrist]] if your vision can't be corrected with [[refraction]].

Non-zero [[refractive state]], which causes [[blur]] and [[double vision]], is only one factor of visual acuity. Various medical conditions can cause physical blockage/dispersion of light in the eye, problems detecting light in the eye, or problems with the visual processing that turns a series of electrochemical signals into a picture in our mind's eye. See an [[optometrist]] if your vision can't be corrected with [[refraction]].

==20/x==

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+[[File:20-20novelgames.PNG|thumb|20/20 vision as diagnosed by [https://www.novelgames.com/en/eagleeye/ Eagle Eye on Novel Games]]]
 Visual acuity (VA) is the measurement of how well the entire vision system can recognize what it sees. Formally, it is defined as the reciprocal of the smallest angle that the visual system can resolve.
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 ==Reasons for differing visual acuity==
-[[Refraction]], which causes [[blur]] and [[double vision]], is only one factor of visual acuity.  Various medical conditions can cause physical blockage/dispersion of light in the eye, problems detecting light in the eye, or problems with the visual processing that turns a series of electrochemical signals into a picture in our mind's eye.  See an [[optometrist]] if your vision can't be corrected with [[refraction]].
+Non-zero [[refractive state]], which causes [[blur]] and [[double vision]], is only one factor of visual acuity.  Various medical conditions can cause physical blockage/dispersion of light in the eye, problems detecting light in the eye, or problems with the visual processing that turns a series of electrochemical signals into a picture in our mind's eye.  See an [[optometrist]] if your vision can't be corrected with [[refraction]].
 ==20/x==