I have always heard that Costa glass lenses (580g) are clearer than their polycarbonate lenses (580p).  However, today I was at an optical store where they said if you order 580p prescription lenses (which I do need Rx) that the polycarbonate lenses are "Trivex" (something that is not available in the non-prescription polycarbonate lenses).  

 

The store clerk said that Trivex is much clearer than polycarbonate lenses and almost on par, if not on par, with the glass lenses that Costa is so well known for (also lighter weight, and more shatter-resistant than glass).  Anyone know if this is true? 

I did not know this about the Rx lenses. Interesting to know!

I have 580G and can attest to their clarity and quality...

I called Costa today... after reading numerous posts here and on other sites I thought everyone pretty much had the glass lenses.  The person I talked to said that polycarbonate outsells glass by quite a margin - and not just because of price, more due to lighter weight and more shatterproof.  

 

She also said in terms of clarity, that prescription Trivex lenses are somewhere in between polycarbonate and glass, and probably much closer to glass.  Confirms what I heard at the optical store.

 

This was all a revelation to me... up until yesterday I was set on ordering my prescription lenses in 580g.  

Does anyone have Costa prescription lenses - if so, plastic, Trivex or glass?  How is the quality of vision, durability, weight, etc?

Don't know about the Trivex lens but I just don't like glass next to my eye, JMHO.