Vision protectors are items that are worn to protect the eyes from damage. The most common vision protector is an EYELID, which is a thin membrane that covers and protects the eye from dust, dirt, and other foreign particles. Eyelids also help to keep the eyes moist and lubricated, which helps to prevent dryness and irritation. Eyelids also help to reduce glare from bright lights, which can cause discomfort and even temporary blindness.