Pronounced astigmatism is easily detected because it produces reduced vision. Once detected the presence of high astigmatism, ie greater than 3 diopters lenses, it is important to complete the studies with the topography, a map of the corneal surface, which can diagnose whether the astigmatism is stable or progressive astigmatism is what is more severe and in this case required special treatment.
However, small astigmatism go unnoticed by routine examination. That is, despite having astigmatism can see all the letters of the cartel office. This little altered very little astigmatism eyesight and usually causes no problem for life or for the sport. No need to be compensated with the use of glasses. But if a person spends much time using the view, for example, reading or against the computer, appear now to recognize as “visual fatigue.”
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