Your goggles are critical safety equipment. Right below a good helmet and boots, goggles are necessary for limiting any damage to your eyes from branches, roost and other debris. Changing our your goggle lenses from time to time is a good thing to do. It's a maintenance item just like changing your oil.
Lens life can vary dramatically from rider to rider. It's a judgement call we all have to make. If you have questions, please email us at: email@example.com