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Noun1.Snellen - Dutch ophthalmologist who introduced the Snellen chart to study visual acuity (1834-1908)
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Average testing time was also measured, with researchers reporting that the Snellen test took 82 seconds compared with 77 seconds for 'Peek Acuity,' which shows that using Peek is as quick to use as traditional methods, they said.
And just as importantly they are industry leaders in the development and implementation of international safety standards," says Eric Snellen, Modex CEO
Incidentally, this point may be as good as any to mention that IPC-OI-645 also has a requirement on visual acuity, calling for far better vision than 20/50 Snellen and for normal color perception.
Ignas Snellen of Leiden Observatory in the Netherlands and colleagues analyzed the planet's spectrum.
The logarithm of 1 is 0; therefore, a person with 20/20 Snellen VA has a logMAR VA of
Insect pests infesting litchi in India have been recorded as fruit and seed borers or litchi stem-end borers (Conopomorpha cramerella Snellen, C.
Then, the best corrected visual acuity was measured for right, left and both eyes using Snellen visual acuity chart.
Assessing vision with a Snellen visual acuity chart gives a clue as to the extent of the problem (e.
They were asked to perform a standard eye chart test called the Snellen Tumbling E test, which asked participants to view the letter E turned in four different directions and in various sizes.
His Snellen visual acuity fluctuates significantly, with an average acuity of about 20/400.
The Snellen Eye Chart defines vision by comparing the top number of a normal eye to the bottom number of the patient - the larger the bottom number, the poorer the vision.