Visual Acuity

The clarity or sharpness of vision is known as visual acuity and 20/20 vision is a term used to express normal visual acuity that measured at a distance of 20 feet. 20/20 vision does not necessarily mean perfect vision skill.

Some people can see well at a distance, but are unable to bring nearer objects into focus.

The primary measurement tool for vision acuity is the letter chart introduced in 1862 by Donders and Snellen at the Eye Infirmary at Utrecht in the Netherlands. Letter chart acuity tells us something about the very small retinal area onto which the letter seen is projected..

Visual acuity loss can detect many disorders, though not all like glaucoma, which can do extensive and irreversible visual field damage before visual acuity is affected.

Visual acuity measurement is a good screening tool because normal visual acuity requires that all levels of the visual system function properly. 

There are many safe and affordable options for those in need of vision correction, including Glasses, Contact Lenses and Surgery.

Drop in to any 20/20 Eyeglass Superstore® location or schedule an eye exam online. We also have in-house optometrists that are available for full eye examinations. We look forward to becoming your number one source for all your eye care and eye fashion needs.  You can also follow us on Facebook or Twitter to stay updated on eye trends and eye health.

For more information on visual acuity, you can read the following articles:

·         http://www.aoa.org/patients-and-public/eye-and-vision-problems/glossary-of-eye-and-vision-conditions/visual-acuity

·         http://www.precision-vision.com/index.cfm?fuseaction=feature.display&feature_id=9

·         http://www.webmd.boots.com/eye-health/guide/visual-acuity