Variations in corneal curvature and refractive error in CAB gas-permeable contact lens wearers.

34 patients wearing CAB gas-permeable contact lenses were studied during a 360-day period. It was found that the horizontal corneal meridian and the spherical refractive error did not show change. However, a significant decrease was observed in both with-the-rule toricity and with-the-rule astigmatism.