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what does 20/25 vision mean?

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I have 20/25 eyesight. What does this mean?
I just had an eye exam. My doctor said that my prescription is very mild. Do you think that people with this type of eyesight even need glasses? Is 20/25 pretty good? And what exactly does it mean?
Update: Lol, I practically answered my own question, I know... but I'm just curious about your opinions. :)

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asked May 17, 2017 in Health by Viinasu

4 Answers

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"20/25" means is that the detail you can make out at 20 feet can be seen by the "normal" eye can see from 25 feet away. I.e. the normal eye can move 25% further away and see the same thing.

20/25 is good vision, and well within the limits to drive without glasses. In fact, a lot of people who wear contacts don't achieve 20/20 due to uncorrected astigmatism. Quite many lens wearers top out at the same 20/25 you measure to without any correction.

Most people can see 20/15 when fully corrected. Some can even get to 20/10.

Without knowing the rest of your details, I suspect that with glasses you'd measure at 20/15. You'd definitely notice the difference in clarity, but the difference may not be worth the frame-impairment in your visual field or the reflections from the lenses (that will occur even with the best of the antireflective coatings).

Personally, I wouldn't recommend someone with your prescription rush out to get glasses unless you have a need, such as having season tickets (aka disposable income) to football games in the upper level and want to read the names on the jerseys or a job with critical vision requirements (like an umpire or pilot). I would only recommend the glasses if you have different vision in each eye that is bothersome to you.

If you're considering sunglasses, you may want to consider prescription lenses. But, I wouldn't rush to this either if you're happy with <$20 sunglasses.
answered May 17, 2017 by xbone
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What is 20/25 vision? What does it mean? Is it better or worse than 20/20 vision?
The correct answer has already been given by several people (namely that this standard of measurement compares the viewer (who stands at 20 feet)  with the "normal" person .

If the viewer is very near sighted, the first line he can read off the chart  is so large that the "normal" viewer  can read it from a lot further away (for example 20/200.  This means that the nearsighted  person has to get really close to the chart - 20 feet) to see what normals see at 200 feet.

The reason 20 feet is used as the standard, is because, at this distance, the lens of the eye (which can provide additional focus) is maximally relaxed.  At this distance, the lens can do nothing to contribute to overall acuity. (This is also why, after doing a lot of close work, people are advised to look into the distance.  Looking afar allows the lens (which was working very hard to help with reading) the opportunity to relax.

Acuity of 20/25 is still quite good.  Drivers must have at least 20/40 acuity 

Most people who have difficulty seeing distant objects without glasses can be corrected to 20/20 with lenses-even those   with 20/800 vision .

A person is considered to be legally blind if the best correctable acuity is 20/200. 

answered May 17, 2017 by Joyce Schenkein
0 votes
What is 20/25 vision?
A person with 20/25 vision can stand 20 feet from an eye chart and see the same detail as a person who has 20/20 vision that stands 25 feet from the same chart, according to Divyesh Eye Hospital. The term "20/25 vision" is used to describe the quality of a person's vision compared to someone with 20/20 vision, which is considered “normal” or “average” vision.
Divyesh Eye Hospital explains that 20/20 vision is not necessarily “perfect” vision although some people believe that to be the case. Rather, this figure is used for comparison purposes. Some people can see better than 20/20. For example, someone with 20/15 vision can see at 20 feet what the average person can see at 15 feet. Alternatively, someone with 20/40 vision must stand 20 feet away from the eye chart to see the same amount of detail that a person with 20/20 vision can see at 40 feet.
These comparisons have several practical uses, says Divyesh Eye Hospital. For example, they are used to determine the cut-off for legal blindness, which is 20/200 in the United States. They are also used to determine eligibility and licensing requirements for certain occupations. To obtain a pilot's license, 20/20 vision is commonly required. One must have 20/40 vision to gain a driver’s license without the requirement of corrective lenses, and 20/80 may be used as a qualification for special education assistance.
answered May 17, 2017 by Moryin
0 votes
Is 20 25 vision good?
According to MedlinePlus, a visual acuity measurement of 20/25 is only slightly worse than average. What "20/25" basically means is that a person's eye can see at 25 feet what a typical eye can see at 20 feet.
The standard eye chart used in most optometry offices was invented by the Dutch ophthalmologist Dr. Hermann Snellen in 1862, according to Prevent Blindness. The visual acuity fractions are actually measures of sharpness of sight, meaning that they refer to the eye's ability to pick out small, high-contrast details at a distance. Visual acuity measurements can vary between a person's two eyes.
answered May 17, 2017 by Robert

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