Skip to main content
Select Source:

visual acuity

visual acuity Sharpness of vision: the ability of the eye to distinguish between objects that lie close together. This hinges on the ability of the eye to focus incoming light to form a sharp image on the retina. Visual acuity depends on the cone cells, which are most densely packed in the fovea, close to the centre of the retina, and are therefore in the optimum position to receive focused light. In addition, each cone cell synapses with a single bipolar cell in the retina and is thus able to send a separate signal, via the optic nerve fibres, to the brain.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"visual acuity." A Dictionary of Biology. . Encyclopedia.com. 19 Aug. 2017 <http://www.encyclopedia.com>.

"visual acuity." A Dictionary of Biology. . Encyclopedia.com. (August 19, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/visual-acuity

"visual acuity." A Dictionary of Biology. . Retrieved August 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/visual-acuity

visual acuity

visual acuity (vizh-yoo-ăl) n. sharpness of vision. Acuity of distant vision is often expressed as a Snellen score (see Snellen chart).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"visual acuity." A Dictionary of Nursing. . Encyclopedia.com. 19 Aug. 2017 <http://www.encyclopedia.com>.

"visual acuity." A Dictionary of Nursing. . Encyclopedia.com. (August 19, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/visual-acuity

"visual acuity." A Dictionary of Nursing. . Retrieved August 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/visual-acuity