Da. Atchison et al., SPECTACLE LENSES WHICH CORRECT OBLIQUE ASTIGMATISM AT ALL OCULAR ROTATIONS - INVESTIGATION OF MERTE CONICOIDAL SURFACES, Ophthalmic & physiological optics, 16(5), 1996, pp. 438-446
Merte (1950) described lens forms that correct oblique astigmatism at
all ocular rotations. The front surfaces of all lenses were flat, and
the back surfaces were made aspherical as conicoids. Merte did not pro
vide a derivation of his formulae for the appropriate conicoidal surfa
ces. We show that Merte's formula is correct and describe the nature o
f appropriate conicoidal back surfaces of spectacle lenses. Copyright
(C) 1996 The College of Optometrists.