Contact lenses can hurt the eyes since they cause changes in the structure of the cornea, tear production, and carbon dioxide and oxygen levels. The alterations can cause severe eye infections and irritation. Contact lenses also trap irritants such as makeup, dust, pollen, etc., leading to burning, red, and itchy eyes. The wrong contact lenses can cause pain, burning, and irritation. If the lens material's wettability is lower, pain and discomfort may arise. Wrong contact lens solutions, failure to follow recommended wearing schedule, poor fitting, dirty lenses, and lens design, can hurt the eyes.