• Reproduced, with permission, from Wisnicki HJ. Bifocals, Trifocals, and Progressive Addition Lenses. In: Focal Points, Clinical Modules for Ophthalmologists, Module 6. San Francisco: American Academy of Ophthalmology; 1999. Illustration by Christine Gralapp, MA, CMI
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    Refractive Mgmt/Intervention

    Progressive lens