EYE ADVICE: Professional Papers

(iii) Keratoconus

The irregular astigmatism in keratoconus may well necessitate shorter working distances to increase magnification, as in the case of uncorrected regular astigmatism. It would thus be important to prescribed as little minus power as possible for the distance prescription and to give a plus addition for excessive near work. This is especially so for those cases where there is a significant drop in the visual acuity, since these patients are apt to work at an even shorter working distance, predisposing to the effects of myopia and 2° PMA.

It would also be important to ensure that the maximum WTR or least possible ATR cylinder is prescribed which gives adequate vision. Good visual hygiene would be especially important to keratoconics. Other important associations between MA and keratoconus also exist that are beyond the scope of this paper.

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