The chart used to test visual acuity with black letters of various sizes against a white background.
Test chart used for assessing visual acuity. Contains rows of letters, numbers, or symbols in standardized graded sizes, with a designated distance at which each row should be legible to a normal eye. Usually tested at 20 ft.
One of several charts used to test vision. Letters, numbers or symbols are arranged on the chart in decreasing size from top to bottom.
Chart containing lines of letters or numbers, graded in size and drawn to Snellen measurements; used to test central visual acuity.
The traditional eye chart used to measure visual acuity, consisting of rows of characters in decreasing size.
display consisting of a printed card with letters and numbers in lines of decreasing size; used to test visual acuity
an eye chart used by ophthalmologists , optometrists , and opticians to measure visual acuity
The eye chart commonly used to measure visual acuity, where good vision is 20/20
Standard chart with letters, numbers, or symbols printed in rows of decreasing size used by eye care professionals in distance visual acuity testing. The chart was invented by Dutch ophthalmologist Hermann Snellen.
An eye chart used to test a patient's vision.
standardized test chart used to measure visual acuity. Visual acuity is expressed as a fraction (e.g. 20/20) in which the numerator denotes the testing distance and the denominator indicates the distance at which a person with normal eyesight can read the letters on the chart. For example, if the smallest letters that a person being tested can see are on the 20/40 line, it means a person with normal eyesight can see these same letters at a testing distance of 40 feet. (Ref: Contact Lens Council)
The familiar eye chart with larger letters at the top and smaller ones at the bottom, the chart is used for measuring central vision.
A Snellen chart is an eye chart used by eye care professionals and others to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Hermann Snellen who developed the chart in 1862.
