Dry eyes at 50 years old can be regulated by using eye drops, changing the way you use your eyes, and improving your diet, which may be caused by abnormal tear gland secretion function, visual fatigue, and vitamin A deficiency. 1. Lacrimal gland secretion function abnormality: if the lacrimal gland secretion function abnormality can cause tear secretion reduction, thus causing dry eyes, can also cause dry eyes, you can use artificial tears eye drops to relieve dry eye symptoms. 2. Visual fatigue: If you watch cell phones, TV, newspapers, etc. for a long time, without the combination of work and rest, can cause visual fatigue caused by dry eyes, and even the emergence of eye congestion, so you should change the way to use your eyes, adjust the habit of looking at certain things for a long time. 3. lack of vitamin A: when the diet is not appropriate, nutritional deficiencies, can cause vitamin A deficiency and thus dry eyes discomfort, can be appropriate to eat more animal liver, carrots, spinach and other vitamin A-rich foods. It is recommended that people with dry eyes to develop a good diet, eye habits, or use eye drops to improve the symptoms, the drugs need to be used in accordance with the doctor’s instructions, should be avoided blindly use their own medication.