You only get one pair of eyes so it's important to care for them as best you can. If you wear contact lenses, here's one thing you can do to keep your lenses clean and prevent eye infections. Every three months (at least) replace your case with a new one. In between replacements, disinfect the case after every use by rinsing it with your sterile contact lens solution. Then leave it open to air dry to prevent bacteria from growing. When was the last time you changed contact cases?