Airplane air quality tends to be drier and more irritating to the eye, especially if youre a contact lens wearer, says Dr. Lowe. Using rewetting or lubricating drops in your eyes before boarding (keep the bottle handy during the flight too) is a smart way to prevent irritation caused by dry eyes. Bring along an extra pair of lenses and your glasses, just in case. And while youre on vacation, its never a good idea to expose contact lenses to pool or hot tub water, which is full of irritating chemicals and bacteria that can cause infections.