0
Why does the subject stand 20 feet from the snellen eye chart to test distance vision?
Wiki User
∙ 9y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Is used to measure distance vision?
Snellen chart
Vision test aid --------- chart?
snellen chart
What is a visual test for normal vision?
Usually a Snellen's Chart is used to assess vision.
When was Snellen chart created?
Snellen chart was created in 1862.
What has the author Hendrik Snellen written?
Hendrik Snellen was a Dutch ophthalmologist known for his work in eye diseases and vision tests. He is credited for developing the Snellen chart, a tool used to measure visual acuity.
Crucial line 8 of a snellen chart reads DEFPOTEC what is the snelle chart used to test?
20:20 vision
What instrument measures visual acuity?
snellen chart
What is the partner of the snellen chart?
jaeger chart
What is the purpose of a snellen chart?
The Snellen chart is the chart used by opticians to measure the sharpness of your eyesight (or visual acuity). It was developed by Dr Hermann Snellen in 1862. It has several lines of letters which get smaller as you go down the chart. The chart is placed level with the eyes at a distance of 20 feet (in Europe 6 metres). The standard reference eye is said to have 20/20 vision but this is not particularly good, any more than an IQ of 100 is good. If at 20 feet you can only just read letters that a person with "standard" eyes could read at 40 feet then you have 20/40 vision or if at 20 feet you can only just read letters that a standard eye could read at 60 feet then you have 20/60 vision and so on. If you can read the bottom line of very small letters on the Snellen chart your vision is an excellent 20/10. If you can read the third line from the bottom then it is a "standard" 20/20 which most people have fallen to by the age of 60.
Who is Dr. Hermann snellen?
Dr. Hermann snellan is the doctor that invented the snellen eye chart.
What is name of the eye chart in most doctors offices?
Typically, the eye chart is the Snellen chart.
Visual acuity is most evaluated by the use of?
Snellen Chart
