1. Residual astigmatism and visual acuity with hydrogel contact lenses: a comparative study;Harris;J Am Optom Assoc,1979
2. Masking astigmatism with spherical soft lenses;Wechsler,1986
3. The gel lens—transferred corneal toricity as a function of lens thickness;Lee;Am J Optom,1972
4. Vision with hydrophilic contact lenses;Sarver;J Am Optom Assoc,1972
5. Visual acuity, astigmatism and soft contact lenses;Grosvenor;Am J Optom,1972