What is 20/20 Vision? How to Convert Diopters to a 20/20 Measure

We all hear the term 20/20 vision thrown about to mean anyone who has healthy eyesight. But what does it mean? And how does it convert to the lens prescription your optometrist gives you, measured in diopters? By the end of this article you'll be an expert on the definition and understanding of 20/20 eyesight.

What is 20/20 Vision?

The average human being with healthy eyesight has 20/20 focus. This is a benchmark measure of what you should be able to see at a distance of 20 feet.

This measure only really becomes important when people stray from the norm. For instance, if you have 20/100 vision, it means that other people can see clearly from 100 feet away, what you can only see at 20 feet. It's a big disadvantage.

Can You Have Better Than 20/20 Eyesight?

Absolutely. Having 20/20 focus is merely the average visual acuity for a healthy human being. But there is nothing stopping you from being above average and gaining better than 20/20 vision.

In fact, some fighter pilots claim to use eye exercises to attain 20/10 vision, while the World Record belongs to a man naturally achieved 20/8 focus by training his eyes for better vision. Eagles have natural vision of 20/2 - hence the expression eagle eye, which means an exceptional eye for detail.

What are Diopters?

If you have poor eyesight (anything worse than about 20/40 vision), your optometrist will write you a prescription. This describes, in a measure called diopters, the refractive power of your new glasses or contact lenses.

You will get a separate diopter value for each eye, because often one eye is slightly weaker than the other. If the measurement has a minus (-) before it, you are nearsighted and have trouble seeing things in the distance. If there is a plus (+) before it, you are farsighted and have trouble seeing things up close.

In most people, blurry vision is caused by refractive errors of the lens. There is evidence to suggest that refractive errors can be corrected by exercising the eyes with various focusing routines. What's more, scientific studies have found that wearing prescription lenses weaken the eyes and make refractive errors worse.

Therefore, the majority of people with poor vision can actually do something about it without resorting to a lifetime habit of wearing glasses. If left untreated, bad vision can lead to more serious complications later in life. So if at all possible, it's especially important that you take action to save your vision now.

How to Convert Diopters to 20/20 Vision

While the 20/20 vision system measures how well you can see compared to a the healthy benchmark, diopters measure the focusing power of your glasses. There is a relationship between the two, shown in the table below. This gives you a very rough conversion between diopters and the 20/20 measurement - but bear in mind there is a lot of variation between individuals.

*Higher diopter values are harder to calculate because it depends on the person - some sources cite a whole range between -4.00 and -6.00 to reflect 20/400 vision. So, these figures are an approximation. Note how the 20/20 measure doesn't increase consistently, and may actually increase exponentially beyond -6.00 (severe myopia).

How to Achieve 20/20 Vision Naturally

I suffered from myopia and astigmatism for 15 years when I discovered eye exercises and the ability to retrain my eyes naturally. I began a course called Rebuild Your Vision and actually noticed a change within three days. When I next visited my optometrist I was delighted to see that my -3.25 / -3.00 prescription (about 20/150) had been cut to -2.25 / -2.00 (about 20/80 vision) in six weeks.

Yet my optometrist was skeptical. She said there was no proof that my eyes would retain their new focusing power. I found this a huge cop out; not only are most optometrists not even educated in vision training, but they are also concerned about losing valuable long term customers. As for requiring proof - that was 18 months ago, and my natural vision has been maintained.

I feel that eye exercise courses like Rebuild Your Vision are one of the best kept secrets in modern healthcare. It's such a tragedy that we are brainwashed into wearing lenses (which make your eyes weaker) or having eye surgery (which permanently damages the cornea). Instead we should be encouraged to try this cheaper and more natural alternative to create healthy vision for life.

The 30-day Program

The Rebuild Your Vision program offers a natural way to restore 20/20 vision with daily eye exercises. This program cut my nearsighted prescription in half in a matter of weeks - and that was just the beginning. I completely eradicated my astigmatism after that. I have a lot to thank for eye exercises.

I decided to work with Rebuild Your Vision because it has one of the best success rates - some 94% of customers keep the course, which promises to deliver a dramatic improvement in your natural vision or your money back. What's more, I reviewed several other well-known programs to make this website and Rebuild Your Vision was the easiest to follow and had the most impact on me. I highly recommend it if you are committed to rebuilding your 20/20 vision.

See Clearly with Rebuild Your Vision

Dramatic vision improvement - or your money back!

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Phone Rebuild Your Vision toll-free on 1-877-733-4543 (7am - 4pm Pacific Time) and quote the discount code: 821401 for the latest special offers.

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Please bookmark this website and share it with your friends and family who wear glasses. They will thank you for it!