Glucoma or black water is the damage and destruction of the optic nerve, which usually occurs in conjunction with high pressure of the eye. In most cases, the disease occurs in the primary form and without a specific cause, but in some cases, it also occurs secondaryly to factors such as severe blows, diabetic bleeding, evascular strokes, excessive use of corticosteroids, etc.‏

The disease is divided into two main categories of closed-angle glucum and open angle glaucoma, based on the anatomical state of the eye. In terms of time, although most of them arise after the age of 40, they are possible to occur at any time in life. The two most common categories of this disease are congenital glaucoma and youth glaucoma. One of the predisposes factors for the occurrence of this disease is a positive family history, diabetes, old age, high number of nearsightedness, low corneal thickness, etc. He named.