Artificial tears are lubricant eye drops used the moisten the eyes. They can be used to reduce the irritation and dryness of keratoconjunctivitis sicca, or dry eyes. They are also used by many wearers of contact lenses, and are frequently needed to moisten eyes for a period following Lasik or laser eye surgery. Artificial tears can be purchased without a prescription, and the best prices can be found online. Brands include Genteal, Refresh, Bion Tears, Thera Tears, Visine, Dwell, Dakrina, Freshkote, Nutratear, and Soothe. There are also homeopathic artificial tears such as Similiasan. Some artificial tears are described as gels or liquigels.