Originally Posted by altiain
I guess that depends on how well you take care of your stuff. :wink:
I typically replace sunglasses every four to five years, and then usually only because I want to update styles. For instance, the pair I just replaced are almost five years old, and they still work fine - I've retired them to mountain biking use.
Then again, sunglasses are more than just a fashion accessory to me - on a bright, sunny day I literally can't be outside for more than a few minutes without them without developing powerful headaches. Therefore, I tend to go the extra length to take good care of my sunglasses. :wink: