how rare is it to have 20/20 vision?
602220
Only about 35 percent of all adults have 20/20 vision without glasses, contact lenses or corrective surgery. With corrective measures, approximately 75 percent of adults have this degree of visual acuity while the other 25 percent of the population just doesn't see very well, Dr. Johnson says.
1028647
The bottom number indicates the distance at which a person with normal eyesight can read the same line. For example, if you have 20/30 vision, it means your vision is worse than average. When you are standing 20 feet from the chart, you can read letters that most people see when they are 30 feet away.
679444
You can have Irlen syndrome visual perceptual problems even if you have 20-20 vision. Are you born with it? Kids in some families do seem to be more light-sensitive. People can develop the syndrome.
511575
20/50 vision or worse is often the visual reduction that is considered bad enough by most patients to need cataract surgery, if that is the cause of the visual loss.
148555
They are also extremely unique and very rare! It has been estimated that only 2% of the world's population have true green eyes. To give you an idea of just how special green eyes are, consider this factoid. Currently, it is estimated that around 7 billion people live on the planet.
196843
“20/20 means at 20 feet you can see what a normal person sees at 20 feet. 20/25 means that at 20 feet you can see what a normal person could see at 25 feet. So a normal person can be 5 feet further away than you. So it's worse than 20/20.
408326
If you have 20/10 vision you are above average! You are better than the “normal” person and you have better than what is considered to be standard or normal, vision. If you have 20/10 vision, you can see at 20 feet, what a normal person can see at 10 feet from an eye chart.
752063
If a visual impairment limits vision to 20/200, or one-tenth of normal vision, a person is considered legally blind. Being legally blind, however, does not mean a person is totally unable to see. People with 20/20 vision but less than 20 degrees of side (peripheral) vision can also qualify as being legally blind.
1008537
Simply put, if your prescription is -2.5 or lower, this means that you are legally blind. Visual acuity of -2.5 is equivalent to 20/200 vision.
836729
So if you have 20/40 vision, this means that you can see only as good as a normal person can see at 40 feet away from an eye chart. ... If you have 20/10 vision you are above average! You are better than the “normal” person and you have better than what is considered to be standard or normal, vision.
165588
This is regarded as “normal vision” and describes what someone should see when standing 20 feet away from an eye chart. 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.
1170654
If you have 20/30 vision, it means that your vision is worse than average. It means that you are standing 20 feet from the chart, but you can read letters that those with normal vision can see at 30 feet away.
1175935
Visual acuity refers to the sharpness of vision at 20 feet from an object. A person with 20/50 vision can clearly see something 20 feet away that a person with normal vision can see clearly from a distance of 50 feet. Bad distance vision was considered "improved" if corrections boosted visual acuity to 20/40 or better.
1057822
HD glasses generally cost about 25 to 30 percent more than conventional glasses. ... People who already achieve 20/20 vision with corrective lenses but have problems with glare or visual distinction are most likely to benefit from HD glasses.
333963
Visual acuity refers to the sharpness of vision at 20 feet from an object. A person with 20/50 vision can clearly see something 20 feet away that a person with normal vision can see clearly from a distance of 50 feet.
168434
As an example, pilots must have normal color vision, distance acuity no worse than 20/70 in each eye correctable to 20/20, near vision 20/20 without correction, and meet other refraction and astigmatism requirements. Corrective eye surgery may also disqualify applicants for pilot or other specific roles.
1107601
Answer and Explanation: The number that 20 is 80% of is 25.