Abstract
Progressive-Addition Lenses (PAL) are commonly designed for non-astigmatic lens wearers, yet a large proportion of the population requires toric correction. Moreover, the optical performances of PAL are always given for lenses with spherical prescription. In fact, the charts of optical performances for PAL with toric prescription are not easy to interpret because of the combination of astigmatism induced by the progressive surface, the toric surface, and the obliquity of light rays.
© 1996 Optical Society of America
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