Dry eyes and redness may be caused by dry eye, conjunctivitis, allergy, etc. 1. Dry eyes: Due to the dysfunction of the blepharoplasty and lacrimal glands, the tear film formation and maintenance time of the eye surface will be affected to a certain extent, and the lack of tear film will lead to dryness of the eye surface and congestion of the conjunctiva, which will cause dryness and redness of the eyes. 2. Conjunctivitis: As the conjunctiva is rich in blood vessels, when it is infected by bacteria and other infections, it will lead to conjunctival vascular congestion and localized heating, accelerating the evaporation of the tear film, leading to the symptoms of dry eyes and redness. In addition, there may be symptoms such as itchy eyes and increased secretion. 3. Allergy: allergic reaction of the patient’s conjunctiva due to contact with allergens, resulting in dry and red eyes. There may be other reasons for the symptoms of dry and red eyes, which should be treated in time to avoid the loss of vision and affecting the quality of life.