title: Clinical evaluation of FDA approved toric hydrophilic soft contact lenses (Part I).
abstract: Three toric hydrogel contact lenses have been approved by the FDA, Durasoft TT, Hydromarc, and Hydrocurve II. These all incorporate prism ballast as the major axis stabilizing feature, but differ in diameter and placement of the cylinder. Correct cylinder axis positioning and maintenance of meridional stability are essential to fitting success.
mesh_terms: D001251:Astigmatism / Q000628:therapy; D003263:Contact Lenses, Hydrophilic / Q000592:standards*; D006801:Humans; D055095:Optics and Photonics; D012029:Refraction, Ocular