As The Verge explains in the video below, eye charts measure one aspect of healthy vision: ... A perfect 20/20 score on an eye chart test doesn't mean you have perfect vision: Visual acuity, ...

The acuity measurement is done 20 feet away from the chart and the test is done with each eye separately. Most digital or electronic eye charts are based on a similar principle.

In his famous eye chart, each row represents a different dioptre, which measures the distance you would have to be from the text to read it. Monoyer also inserted his name into the chart.

Eye - Performance of a computerised visual acuity measurement device in subjects with age-related macular degeneration: comparison with gold standard ETDRS chart measurements Skip to main content ...

At least once in your life, you must have squinted at the eye chart at the doctor’s office or DMV, trying to make out the blurry bottom line. Turns out, there’s some very precise math that ...

Sony's Hawk-Eye technology will be used by the National Football League as the primary method for measuring the line to gain, beginning with the 2025 season. Sony's Hawk-Eye virtual measurement ...

As they described in a study, published in the Canadian Journal of Ophthalmology in February, the modern version of the Snellen chart consists of 11 lines of letters, printed in decreasing size ...

The NFL will use Sony's Hawk-Eye technology as the primary way to measure the line to gain, the league announced Tuesday at its annual spring owners meetings. The technology will use six 8K ...

Eye doctor Herman Snellen (Dutch, 1834–1908) developed the most commonly used eye chart in the 1860s. The now iconic Snellen chart contains 11 rows of capital letters decreasing in size as the eye ...

NEW YORK and PALM BEACH, Fla., April 1, 2025 /PRNewswire/ -- Sony's Hawk-Eye technology will be used by the National Football League as the primary method for measuring the line to gain, beginning ...