mgb_phys, Thanks for your reply. I understand the concept of progressive lenses, aspheric over standard spheric and back surface free form over front surface molded lenses.
It's this concept of wavefront technology that troubles me. Opticians can tell me what it does but not how it does it...
Hi Everyone
I'm new to PF, interestng reading, great site :o)
I have a question relating to wavefront technology in optics.
I visited my optician and they tried to sell me one of the new generation progressive lenses made as free form technology. Free form technology I understand...