In some cases it is possible to cause corneal edema from dry eyes, especially in the case of dehydration. Dry eyes refers to the insufficient secretion of eye tears or the maldistribution of tears or the excessive evaporation of tears, which usually happens on the cornea and makes it unable for the tears to keep the wettability of the surface of the eyeballs. In general cases, corneal edema is caused by dehydration, bacteria infection, surgery injuries, high eye pressure, and so on. The dry eyes can affect the eyes in many ways. For example, the eyes will feel very dry and fatigue, itchy and foreigh body sensation, eyes burning, the eyelid tight and heavy, eye photophoby, temporary blurred vision, and so on. Sometimes the eyes are so dry that the basic tears are inadequate and on the contrary to stimulate the eyes to secrete tears, which usually leads to frequent tears. When the condition is very serious, the eyes will become red, get congestion and cornification, which will damage the vision. To prevent the dry eyes, people should pay attention to ensure adequate rest and sleep, the eye hygiene, and eat some more vegetables and fruits.
