What line is 20 40 on eye chart?
The third line is equivalent to 20/40, it is the driver’s test line. You must be able to read most of the letters on this line in order to obtain an unrestricted drivers license in most states including Ohio.
Does 20 40 vision need glasses?
A person with 20/40 vision sees things at 20 feet that most people who don’t need vision correction can see at 40 feet. This means that they are nearsighted, but only slightly. A person with 20/40 vision may or may not need eyeglasses or contacts, and can discuss his or her options with a doctor.
What does a 20 40 vision mean?
If you are diagnosed with 20/40 vision, it means that at 20 feet – you can only see the details that a person with normal vision sees at 40 feet.
What is 20 40 on a Snellen eye chart?
Vision or visual acuity is tested by reading a Snellen eye chart at a distance of 20 feet. … If you have 20/40 vision, it means that when you stand 20 feet away from the chart you can only see what a normal human can see when standing 40 feet from the chart.
What is a bad vision score?
20/30 to 20/60, this is considered mild vision loss, or near-normal vision. 20/70 to 20/160, this is considered moderate visual impairment, or moderate low vision. 20/200 or worse, this is considered severe visual impairment, or severe low vision.
What is normal vision in numbers?
“Normal” vision is 20/20. This means that the test subject sees the same line of letters at 20 feet that person with normal vision sees at 20 feet.