The denominator (bottom 400) is a comparison to someone with standard vision. So if you have 20/400 vision you would have to be at 20 feet to see what one with standard vision would see at 400 feet. 20/400 does not correlate to your exact prescription, it is merely a measure of your vision without (hopefully) your eyeglasses or contact lenses on.
If you are fully corrected and seeing 20/400, that does mean you are legally blind. It also means that what you see at 20 feet with that level of acuity is what a person with ‘perfect’ vision can see at 400 feet. Many people only see 20/400 uncorrected, and can see 20/20 after they wear glasses or contacts. ref: Low Vision
The American Foundation for the Blind states that 20/200 vision is the clinical definition for legal blindness. Therefore, a person with 20/600 vision is considered legally blind. With 20/600 vision, an individual sees people only as shapes, WPTV indicates. CNN explains that this level of eyesight impairment is comparable to a newborn's eyesight.
My vision is 20/400 what are my options to drive? I looked at the different states and see that Missouri will give you a restricted license if your 20/160. I live in Florida and it just says 20/70 in either eye. I cant even see the big 20/200 E with either or both eyes. I have about -4.5 diopters of myopia :hammer:with very slight irregular astigmistim.
People with acuities of 20/200, 20/400, or 20/600 have some vision, but they don't see with the same degree of clarity that a person with an acuity of 20/20 or 20/50 sees. When a person has 20/200 distance acuity during an exam, he is usually only able to see the big "E" on the eye chart in the eye care specialist's office.
That means that you can see at 20 feet what those with normal vision can see at 40 feet. You have 20/40 vision. If all you could see was the large E at the top of the Snellen Chart, then your vision would be 20/400. You'd be seeing at 20 feet what a person with normal vision can see at 400. Thanks to today's corrective lens technology and ...
20/20 Vision Vs. 20/200 Vision. You're considered legally blind if your eyesight is worse than 20/200. This is what your world would look like. Posted on October 23, 2016, 13:02 GMT ...
What does legally blind look like. ... 20/40 20/70 20/100 definition There is only 1 letter of difference on the vision chart between 20/100 and 20/200…they are that close in visual acuity. Open this link: legally blind and you will see 20/20 20/200, which is legally blind 20/400. 20/800 acuity. Now, you can get an idea of what a visual ...
How Bad Is 20/200 Vision? A visual acuity of 20/200 is considered low vision, not far removed from legal blindness. WebMD defines low vision as a visual acuity of between 20/70 and 20/200, with corrective measures such as eyeglasses employed.
Depends. There is not a direct correspondance between 20/400 vision (the big e on the charts), and the values needed to correct it. It will be a combination of + or - power along with some degree of astigmatism.You need an ophthalmologist to determine the exact correction.