Astigmatism after contact lens wear.
With-the-rule astigmatism increased by more than 3 D in 2 habitual long-term wearers of contact lenses after they abruptly stopped wearing their lenses. Reducing wearing time gradually over a 2- to 3-month period caused less than 1 D increase in with-the-rule astigmatism in 2 other long-term wearers. All 4 persons had worn polymethylmethacrylate contact lenses for 12 or more years.
D000328:Adult; D001251:Astigmatism / Q000209:etiology*; D003261:Contact Lenses / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D013997:Time Factors