title: Effective powers of flexible contact lenses.
abstract: Predictions of effective powers of flexible contact lenses including tear lenses, or assuming alignment, are compared with actual equivalent sphere effective powers of 12 low-minus and 2 high-plus lenses. The assumption of a tear lens improves accuracy of prediction.
mesh_terms: D003263:Contact Lenses, Hydrophilic / Q000592:standards*; D006801:Humans; D055095:Optics and Photonics