For my advice, dry eyes are caused by lack of antioxidative vitamin,zinc lon and protein.
For antioxidative vitamin,you can take large amount of deep colored vegetables like carrots and also fruits like mango with plenty of vitaminC and A.Besides,plant seeds like peanuts can help you get vitaminE.
For zinc lon and protein,you may bring cooked animal liver and kidney in your diets which can improve the provision of blood.At the same time,diary , marine food product and beans can help complement protein.
Finally,you can do eye exercises after doing a lot of paper work or concentrating long time on computer.
Hope that will help.
Vitamin A is known as the eye of god. So,there is no need to say that Vitamin A is good for eyes. It can prevent eyes from being dry. And can prevent night blindness. Carrot and most green and yellow vegetables are rich in Vitamin A. Some fruit such as, oranges and abundant in the red contains a lot of Vitamin A. At the same time, you should drink less alcoholic and beer, because they are bad for your eyes. I hope my answer can be helpful.
Besides using the eyes drops to moisture your eyes to get rid of the dryness of the eyes, you could eat the food with vitamin C to help you with the dry eyes. There are a lot of foods with vitamin C that you could take them into reference. You could take some fresh vegetables, such as spinach, vegetable, leek, green peppers, cucumber, pakchoi, broccoli and cauliflower with fresh jujubes. There are also a lot of fruits rich in vitamin C, like kiwi, hawthorn, grapefruit, strawberries, oranges, lemons and so on. The food containing with vitamin C can enhance immunity, reduce your heart disease and stroke, accelerate wound healing to relieve asthma and prevent cold. In addition, it could also have the anti-aging effect. You could take these food more to help not only your eyes but also your health. You could also take these to improve your beauty. At the same time, you could also use the warm compress to make your dryness of the eyes get released.