Difference between revisions of Visual acuity
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which approaches 2, and we can be almost certain that if, with a good illumination, the acuity is only equal to 1, the eye presents defects sufficiently pronounced to be easily established.</blockquote> | which approaches 2, and we can be almost certain that if, with a good illumination, the acuity is only equal to 1, the eye presents defects sufficiently pronounced to be easily established.</blockquote> | ||
==Reasons differing visual acuity== | ==Reasons for differing visual acuity== | ||
[[Refraction]] is only one | [[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]]. | ||
==20/x== | ==20/x== | ||