Spherocylindrical-power reference lens
October 2018 IODA has made this octagonal lens with one spherical surface and one toroidal surface that is used to check the non-symmetric error given by the automated focimeter after calibration. The specially mounted spherocylindrical-power reference lens with a power of –2,00 D sph/–1,50 D cyl, of ophthalmic form and quality conforming to ISO 8980-1,…
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