Difference between revisions of 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]].