Generally speaking, sore eyes can be caused by overuse of the eyes without any rest, staying in dry environment for too long, malnutrition in the eyes, physical irritations, and so on. To reduce or avoid the sore eyes, first of all, you had better pay attention to your use of the eyes. Try to develop good habits in using eyes, such as take a break every hour to watch distant objects or do eye exercises, Do not stay before the computer or TV for too long a time. Secondly, you should avoid getting touch with pollution sources such as fluorescent radiation and waste gas in case of irritation. Besides, the best prevention is to keep the eyes clean and moist, and applying eye drops and eye cream is a good choice. In addition, pay attention to your dietary pattern, take in much vitamin A, C, E and D is good for your eyes, too, such as seafoods, vegetables, fruits, cod-liver oil and so on. And remember never rub your eyes with your fingers when you feel sore eyes, because rubbing will make the condition even worse and is likely to scratch your cornea.
