If you are talking about the lenses themselves, if they can be removed from the frames, just have new ones cut, and remount with Dow 795 ! You must clean off the old silicone
adhesive 1st ! It is a p i a ! I got Dow Corning 1200 OS primer after talking to techie there ! I had an issue with the silicone not sticking well to the new lens ! Cleaned the edges with 1200 and it is almost as good of a bond as using the 795 ! The 1200 is pricey $$$ I paid $43 for a pint can ! Note our old lenses were from 79 and dull and crazed ! I tried
head light cleaner compound, rubbing and polishing compound etc ! nothing worked !