Can someone give me a simple understanding o Regressive Technology as it relates to how a Progressive Lens is deigned? I get how it works, but looking for more understanding of manufacturing. Thanks in advance for any help.
Can someone give me a simple understanding o Regressive Technology as it relates to how a Progressive Lens is deigned? I get how it works, but looking for more understanding of manufacturing. Thanks in advance for any help.
The TL;DR version:Originally Posted by BradB
A progressive is designed for distance with the bottom having additional power.
A Computer or regressive is designed for near and looses a percentage of the additional power towards the top.
As simple and explanation as it gets, hopefully.
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Degressive is the most common term used for PAL intermediate task lenses, although in a different application, this patent (the Definity PAL I assume) uses the term "regressive surface".
https://www.google.com/patents/US6139148
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
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