Generally speaking, glaucoma most often occurs among the group of adults who are over the age of 40, but it can also occur among groups of young adults, children, and even infants. For most of the people who got glaucoma, there are usually very few or no symptoms before the morbidity. Often the first sign of glaucoma is the loss of peripheral or side vision, which can go unnoticed until late in the disease. To detect glaucoma in an early time, you should have a complete exam with an eye specialist every one to two years in case there are some other complications such as twitching eyes or itchy eyes. Occasionally, intraocular pressure can rise to severe levels. In these cases, sudden eye pain, headache, blurred vision, or the appearance of halos around lights may occur. Dry eyes might as well be one of the complications of glaucoma. If you feel dry eyes, you may use some eye drops to help moisten the eyes, and do not overuse your eyes. Allow your eyes to have adequate rest. Malnutrition can also lead to dry eyes, therefore you had better eat more vegetables, fruits, fish or fish oil. If the condition of dry eyes is serious, you have to go to the doctor's for an eye examination.