PubMed · 11008494
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G Renard. 2000-06-01. [Will refractive surgery replace glasses?].. https://pubmed.ncbi.nlm.nih.gov/11008494/
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Spectacle corrections worn in a frame with a faceform tilt should be used with effective spherocylindrical parameters. For the case of oblique central refraction, Keating presented a procedure to determine these parameters in a third-order approximation. The central equation of his approach, the effective dioptric power matrix, is partly the result of an educated guess. Based on the equations of wavefront tracing, an analytical derivation of his equation, slightly modified however, is given in this paper.