Multifocals: How We Got Here and Ideas For the Future - NACOR 79.180 (1 EC)
Expires 2027-11-25, NACOR 79.180 (1 EC) Multifocals and progressive addition lenses (PAL) were a radical shift in presbyopia correction. The glass bifocal was the accepted method of correction for over 100 years. The first proposal of a PAL was in...
