[PDF] free-form : the principles - Basic Optical
Free-form technology is not limited to lens manufacturing, but is employed amongst others ... has made production of the most intricate surfaces possible. ... or degression surface of varifocals to the back side of a lens. ... Basic Optical Laboratories is a licensed manufacturer of freeform lenses. ... hobbies & use of spectacles,.
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basicoptical's website is basicoptical.co.za