title: Variations in corneal curvature and refractive error in CAB gas-permeable contact lens wearers.
abstract: 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.
mesh_terms: D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000517:prevention & control; D002482:Cellulose / Q000031:analogs & derivatives / Q000592:standards; D003261:Contact Lenses / Q000009:adverse effects / Q000592:standards*; D003315:Cornea / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D010100:Oxygen; D010539:Permeability; D012030:Refractive Errors / Q000209:etiology*
chemical_list: D002482:Cellulose; C014396:cellulose acetate-butyrate; D010100:Oxygen