Abstract
Recent publications 1 admit that “the myopic indexes in the industrial nations have increased and range from 20% to 80% in the U.S. and Europe, to up to 90% in the Far Eastern countries, depending on the age group and the professional population considered”. This increase has again arisen attention on this illness that may be corrected with optical aids and more recently with refractive surgery. In clinical practice, evaluation of myopia or its recovery is mainly, if not exclusively, made with the traditional visual acuity tests. Contrast tests are applied in some cases. However, the literature reports other functional disorders such as considerable variations in the accommodation ranges, chromatic vision defects, specially in colors of short wave lengths2 and alterations in adaptation to darkness3.
© 1997 Optical Society of America
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