45 Household Tools That May Put Us at Risk If They Have Gone Bad

43. Sunglasses

A study published in the Journal Biomedical Engineering Online revealed that sunglasses should be replaced after a two year period. This is because sunlight exposure can diminish the lens’s ability to protect your eyes.

Once the lenses are affected by sun damage, your eyes are exposed to UV rays which can have dangerous consequences. However, the two year period is dependent on the area in which you live, as the weather’s temperature is the critical factor here.