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Visual Acuity.


In: Kolb H, Fernandez E, Nelson R, editors.


Webvision: The Organization of the Retina and Visual System [Internet]. Salt Lake City (UT): University of Utah Health Sciences Center; 1995-.
2005 May 01 [updated 2007 Jun 05].


Visual acuity is the spatial resolving capacity of the visual system. This may be thought of as the ability of the eye to see fine detail. There are various ways to measure and specify visual acuity, depending on the type of acuity task used. Visual acuity is limited by diffraction, aberrations, and photoreceptor density in the eye (1). Apart from these limitations, a number of factors also affect visual acuity, such as refractive error, illumination, contrast, and the location of the retina being stimulated.

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