from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A kind of eye chart.


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word Snellen.


  • This chart which is called a Snellen Eye Chart, measures visual acuity.

    BellaOnline - The Voice of Women

  • In the United States, visual acuity (how clear and sharp our vision is) is generally measured using a Snellen Chart.

    Eyeglasses 101

  • These numbers indicate how well a person can see a particular line on the Snellen Chart at a specified distance.

    Eyeglasses 101

  • Paraponyx diminutalis Snellen (Pyralidae: Lepidoptera) as a serious pest of Nymphoides cristatum in Keoladeo National Park, Baharatpur, Rajasthan.

    Keoladeo (Bharatpur) National Park, India

  • Most of us are familiar with the big "E" Snellen Chart on the ophthalmologist's wall.

    Tom McIntyre's Glossary of Shooting Optics Terms

  • After being assistant to the ophthalmologist H. Snellen Sr. in the renowned eye-hospital Gasthuis voor

    Willem Einthoven - Biography

  • Every school, private and parochial as well as public, should supply itself with the Snellen card for testing eyes.

    Civics and Health

  • Moreover, as shown below, it is needed by children able to pass satisfactorily the Snellen test.

    Civics and Health

  • It is better to have ten separate letters of exactly the right size and the same size than a row of letters on one card, as in the Snellen test, otherwise memory will aid the eye, or, as happened recently, a whole class may agree to feign remarkable nearsightedness or farsightedness by confusing letters learned in advance from the card.

    Civics and Health

  • Practically, however, it is out of the question at the present time to have the majority of children given a more thorough test than that provided by the Snellen card.

    Civics and Health


Log in or sign up to get involved in the conversation. It's quick and easy.