In the open angle glaucomas category are included : primary chronic open-angle glaucoma, secondary open-angle glaucoma, normal pressure glaucoma or low tension glaucoma, congenital glaucoma.
By far the most common type is primary chronic open-angle glaucoma and this type is likely to appear with ageing.This type is dangerous because is rather asymptomatic, the intraocular pressure rises quietly, and the first thing that is affected is the peripherally vision. Patients find out that they suffer from glaucoma very late in the process because of the gradual loss of vision.
The secondary open- angle glaucoma may appear if the patient suffers also from diabetes, inflammation of the iris, cataracts, or retinal vein blockage. It may also occur in case of an injury, even though this happened a long time ago. It is also common among people who take steroids. Normal pressure glaucoma or low tension glaucoma is caused by a low blood flow to the optic nerve. Even though the intraocular pressure is within the normal limits, the peripherally vision is affected and the optic nerve is damaged.
Congenital glaucoma is a rare form of glaucoma that occurs in some children at birth. The glaucoma that occurs early in life is called glaucoma infantile. Children with congenital or infantile glaucoma often have red eyes, showing sensitivity to light and excessive tearing. If the illness is not quickly diagnosed, the child may go blind . Congenital glaucoma may be treated with pills or by surgery.
In the open angle glaucoma’s category is also included a type of secondary glaucoma called pigmentary glaucoma. Parts of the pigment detach from the iris and block the eye’s drainage system.
Studies show that young men are more prone to develop this condition. Another secondary type is exfoliative glaucoma and it is also associated with hearing loss. In this case the drainage is blocked by deposits in the front of the lens.
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