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As you put attention on fitness, your life will soon include the pleasure of walking daily and a natural hunger for whole foods that are nourishing to you. A Fitness Attitude isn't complicated, and you'll feel better. You simply will.There are many resources available to explain The Oxy Solution Review the LASIK procedure; however, very few detail the testing necessary leading up to the procedure. These tests can be seemingly overwhelming and technical. Some of the testing could have been done at an initial consultation, though, some tests may need to be repeated. Each test has a specific purpose to assist the surgeon in obtaining the best results possible.

The first step is to determine the uncorrected visual acuity, which is vision without glasses or corrective lenses. This raises the question of “What does 20/20 mean?” In the U.S. vision is recorded on a chart with standardized letters calibrated to be read at 20 feet away. The fraction that describes vision, for instance, 20/20, 20/40, compares the smallest letters that a person with perfect vision can see at 20 feet to your vision at 20 feet.

 If you are only capable of seeing larger letters on the chart that can be seen by a normal person standing back 40 feet from it, then your vision is 20/40. 20/400, means at twenty feet from the chart you can only distinguish the giant E on top, which could be seen by a normal person from 400 feet away.Some visual acuity levels bear special legal significance. For example, you must be able to see the 20/40 line of letters, or smaller, in order to drive without glasses in the U.S.

 For this reason, statistics for laser vision correction are often quoted in relation to the percent of patients receiving 20/40 vision or better. If the best vision a person can see with corrective lenses is 20/200 in both eyes, that person is legally blind.Next, best-corrected visual acuity must be determined. Refractive error or acuity is measured one eye at a time, covering the other eye with an occluder. Refractive error is the state of the eye for which a prescription is normally given for glasses or contacts. Generally two refractions are completed on a person considering LASIK surgery. The first refraction is called a manifest refraction.