Well, generally speaking, you should know that if you do not have the necessary balance of these three layers in your eyes, or if your eyes do not make enough tears to coat the eye, you may have a condition, which is known as dry eye. And then there are many symptom when someone have chronic dry eyes, they will often feel discomfort, including irritation, burning, grittiness, redness, tearing, and blurred vision. inflammation, or the feeling of something in the eye. Also, there is a decrease in the amount of tear creation due to obstruction or just a minimization in tears. For the causes of dry eyes, it includes hereditary, immune-mediated, drug-induced, surgically induced, or chronic allergic eyelid disease. To treat dry eyes like you, you can just take some foods which are rich in vitamin a. Vitamin a is good for the dry eyes.