Optical power calculation for contact lens wet cells.
Calculations show that there can be a significant error in the estimated power of a hydrogel lens when standard techniques are used to arrive at the lens power by means of a lensometer and a wet cell. Ray-tracing procedures were used to produce graphs which provide more accurate correction factors so that the lens power can be determined with improved precision.
D003263:Contact Lenses, Hydrophilic / Q000592:standards*; D006801:Humans; D055095:Optics and Photonics; D009907:Optometry / Q000379:methods*