Abstract
In order to prescribe correction in children, and after considering visual sharpness, integrity of the anterior segment and motor state, there must be considered the magnitude and the orientation of astigmatism regarding age and ethnic group of the patient. When there is lack of anisometropy, astigmatism with rule should be corrected if they are higher than 2.50 dioptres. As oblique astigmatisms and against rule have a higher ambliopizante risk, lower magnitudes might be taken into account when giving prescription. In case of anisometropy equal or higher to 1 dioptre correction has to be provided.
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