Dry eye is a condition where the eyes do not produce enough tears or where the tears evaporate too quickly, resulting in discomfort, irritation and sometimes blurred vision. Synonyms for dry eye include keratoconjunctivitis sicca, ocular surface disease, dry eye syndrome, eye surface dryness, and tear film deficiency. These terms are used interchangeably to describe the same condition, which can be caused by a variety of factors, including aging, hormone changes, certain medications, and environmental factors like air conditioning and screen exposure. Treatment for dry eye can involve artificial tears, prescription eye drops, and simple lifestyle changes like taking regular breaks from screen time, wearing sunglasses, and using a humidifier.