If you always stay up late, it is unavoidable to feel eyes dry. For this condition, you should take some measures. I guess you always use computer or reading books for a long time in the night. But remember, do not do the same thing all the time. Close your eyes for a rest or look at the far for a while every other hour. Eat more fruit and vegetables, because they contain vitamins which good for eyes. I suggest you drink some green tea when you stay up because it could provide vitamins C and supply enough moisture. What is more, you had better not wear contact lenses unless it is necessary, because it may reduce the tear secrete. You also can use a damp and hot towel on your eyes for 10 minutes in the morning to help your eyes discharge secretion. All the ways above are things you can do on the daily time. If you want relieve it in a short time, try the artificial tears or use Eye ophthalmic gel. But in nature, they are drugs, drugs may have side effects, so I think the ''daily time'' ways are more health and helpful.
