Elimination of aniseikonia in monocular aphakia with a contact lens-spectacle combination.
Correction of monocular aphakia with contact lenses generally results in aniseikonia in the range of 7--9%; with correction by intraocular lenses, aniseikonia is approximately 2%. We present a new method of correcting aniseikonia in monocular aphakics using a contact lens-spectacle combination. A formula is derived wherein the contact lens is deliberately overcorrected; this overcorrection is then neutralized by the appropriate spectacle lens, to be worn over the contact lens. Calculated results with this system over a wide range of possible situations consistently results in an aniseikonia of 0.1%.
D000839:Aniseikonia / Q000517:prevention & control*; D001036:Aphakia, Postcataract / Q000534:rehabilitation*; D003261:Contact Lenses; D005139:Eyeglasses; D006801:Humans; D007910:Lenses, Intraocular; D008722:Methods; D055095:Optics and Photonics