Depending on how bad the lenses are there ways to restore and maintain clarity to some degree. I buff the lenses with rubbing compound initially. May require additional times to get desired results. Then I buff with polishing compound. This may be an annual project to keep lenses manageable. One must understand that yellowing on the inside of the lenses and dirt within also contribute poor visibility.
There are kits to utilize but this has worked well for me. Good luck. MTG
