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THIRD‐ORDER THEORY AND ASPHERIC SPECTACLE LENS DESIGN
Author(s) -
Atchison David A.
Publication year - 1984
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1984.tb00353.x
Subject(s) - oblique case , lens (geology) , astigmatism , optics , spectacle , sagittal plane , refractive error , physics , aberrations of the eye , mathematics , visual acuity , medicine , anatomy , philosophy , linguistics , economics , market economy
Third order equations are developed giving sagittal and tangential power errors corresponding to The eye rotating to look through the periphery of a spectacle lens. The equations are applicable for conicoid aspherical surfaces. From these, other equations are derived for elimination of oblique astigmatism and mean oblique error. Graphical examples show how aspherizing either lens surface affects the lens bendings required to eliminate oblique astigmatism.