Actinic conjunctivitis is a medical condition that causes inflammation of the eye's conjunctiva due to exposure to ultraviolet radiation. This condition is sometimes referred to as photokeratitis or "snow blindness." Some synonyms for actinic conjunctivitis include UV keratitis, solar conjunctivitis, and radiation ophthalmia. Other terms used to describe this condition include light-induced keratoconjunctivitis, corneal flash burn, and arc eye. These synonyms all refer to the same condition, which is caused by exposure to UV light and can be quite painful and uncomfortable. If you suspect that you have actinic conjunctivitis, it is important to seek medical attention promptly to avoid further complications and discomfort.