Glaucoma is caused by elevation of pressure inside the eye that can damage the optic nerve. This usually occurs because the drainage system of the eye becomes blocked and the fluid pressure in the eye increases. There are several reasons for this blockage, which can be determined by an ophthalmologist.

There are several types of glaucoma and some can steal vision so quietly that a patient is unaware of trouble until the optic nerve is badly damaged. Glaucoma can also have symptoms of blurred vision, severe pain, halos around lights, nausea and vomiting. This type of glaucoma can result in blindness within a day or two and a patient should seek medical attention immediately.

People at high risk of having glaucoma are those with diabetes and people who have a family history of the disease. However, anyone can develop glaucoma, especially as we age. Glaucoma is usually treated with eye drops and laser or surgical treatment if drops do not control the disease.