Glaucoma is a set of eye diseases that are often without warning or symptoms and may result in the loss of vision. This disease is caused by optic nerve damage where the optic nerve is responsible for transmitting the images we see to the brain. Contact lens users must be especially careful in caring for their eyes, as they are prone to eye diseases.
There are two basic types of this eye disease, namely open angle, and angle closure. Open angle is the most common form of this eye disease, where the drainage canals of the eyes get clogged over time. The inner eye pressure increases because the necessary amount of fluid can't drain from the eye. Even though the entrances to the drainage canals are clear and working, clogging problems occur in the drainage canals.
The open angle type of this eye disease often shows no symptoms or warnings. It develops slowly and vision problems may not be noticed for years.
When left undiagnosed or untreated, the open angle type of this disease can gradually lead to the loss of vision. 
The angle closure type of this eye disease is much rarer than the first type. Unlike the open angle type, inner eye pressure usually goes up very fast with the angle closure type. This type of eye disease occurs when the drainage canals of the eyes get blocked or covered. Further, with this type of eye disease, the iris and the cornea are not as open and wide as they should be. The outer edge of the iris also bumps into the drainage canals when the pupil of the eye enlarges too much or too quickly, such as when entering a dark room.
Symptoms of the angle closure type of this eye disease include nausea, rainbows around lights at night, headaches, eye pain, and a very blurred vision. This type is treated with surgery where a small portion of the iris is removed to help unclog the drainage canals of the eye, making the extra fluid come out. The eye surgery is usually successful and long lasting. However, you should still go for regular check-ups to ensure your eye's health.
Joanna Winscot is a contributing writer for Bmenet.com. For more News, Articles, Guides, Tips, Tricks and various Health and Beauty Products information... visit our site at Bmenet.com.