snellen chart

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Definitions from WordNet

Noun snellen chart has 1 sense

Snellen chart - display consisting of a printed card with letters and numbers in lines of decreasing size; used to test visual acuity
--₁ is a kind of display, presentation

Definitions from the Web

Snellen Chart

A Snellen chart, also known as a Snellen eye chart, is a tool used by ophthalmologists and optometrists to measure visual acuity. It consists of several rows of letters or symbols that progressively decrease in size from top to bottom.

Sample sentences:

During an eye examination, the optometrist asked me to read the letters on the Snellen chart.
Patients with poor vision may struggle to correctly identify the smallest letters on a Snellen chart.
The Snellen chart is a common tool used to assess the quality of a person's eyesight.