title: Rotation of spherical nonprism and prism-ballast hydrogel contact lenses on toric corneas.
abstract: Six subjects were fitted binocularly with both nonprism and prism-ballast spherical HydrocurveTM contact lenses to evaluate lens rotation on toric corneas. The 1/2 delta and the 1 delta lenses rotated significantly less than the equivalent nonprism lenses. For 11 of 12 eyes, 1/2 delta was sufficient to stabilize the lens.
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000534:rehabilitation*; D003263:Contact Lenses, Hydrophilic; D003316:Corneal Diseases / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D012399:Rotation