Methoden zur Produktion von progressiven Zusatzlinsen

摘要

There is provided a process, for producing a progressive addition lens for a lens wearer, comprising the steps of: a) providing an optical preform; b) providing a mold for casting a surface onto the optical preform; and (c) positioning the preform in relation to the mold in order to provide the resulting lens with a cylinder axis desired for the lens wearer, wherein: either the optical preform or the mold has a predetermined first cylinder axis, a predetermined cylinder power and a predetermined first near vision zone position; and either the mold or the optical preform, respectively, has a second near vision zone position that is aligned with the lens wearer's near viewing pupil location.