What is 20 40 vision 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.

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.

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.

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.

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.

“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.