Laser vision correction does not treat degenerative conditions or eye diseases. It is one of the forms of correction, similar to glasses or contact lenses. It is expected that after the procedure, the patient will see just as well as with the best-prescribed lenses, but without their assistance.
The result of the test, the so-called objective autorefractometer (computer vision test) determines only and exclusively the approximate optical correction (powers of glasses or contact lenses) that can be used. The result of the measurement is influenced by many factors – the degree of moisture, eye fatigue, possible infection of the body or eyes. If “0” is not the only value on the printout from the refractometer, it is not necessarily equivalent to the patient seeing incorrectly. “Zeros” on printouts from refractometer tests are almost never found in people who do not have vision problems either. This means that the values on the printouts do not fully reflect the actual visual acuity.

