Normally, fluid is continually secreted into the front of the eye by a structure called the ciliary body to nourish the tissues and maintain the shape of the eye. Any excess fluid drains away through a gap called the drainage angle.
In glaucoma, the flow of fluid is blocked and the fluid builds up, raising pressure in the eye and leading to impaired vision or even blindness.
Acute glaucoma develops quickly, causing pain and sudden loss of vision. It requires emergency treatment with drugs or surgery. Chronic glaucoma develops more slowly, is painless, and may go unnoticed for years until it eventually causes significant deterioration of vision.
Both types of glaucoma are treated with medication or surgery. Treatment usually prevents further visual loss but does not restore any vision already lost.

Othere related diseases

LABYRINTHITIS
Labyrinthitis is inflammation of the labyrinth of the inner ear, which contains the organs of hearing and balance. It is usually caused by a bacterial or viral ...

MACULAR DEGENERATION
Macular degeneration (also known as age-related macular degeneration, or AMD) is a deterioration of the macula, the central area of the retina responsible for s...

MENIERES DISEASE
Ménière’s disease is an inner ear disorder characterized by recurrent attacks of vertigo, tinnitus (ringing in the ear), and hearing loss. It is due to a bu...

OTITIS EXTERNA
In otitis externa, the outer ear canal becomes inflamed, usually due to a bacterial, viral, or fungal infection. It is sometimes called “swimmer’s ear,” b...

OTITIS MEDIA
Glue ear Otitis media is inflammation of the middle ear, usually due to a bacterial or viral infection. It is more common in children, because their Eustachian ...

OTOSCLEROSIS
In otosclerosis, there is abnormal growth of bone around the stapes, one of the three tiny bones in the middle ear that transmit sounds to the inner ear.
T...

PRESBYCUSIS
A form of sensorineural deafness, presbycusis is progressive loss of hearing that occurs with age. It is due to the natural degeneration and death of sensory ne...

PTERYGIUM
A pterygium is a wing-shaped thickening of the conjunctiva (the clear membrane covering the white of the eye) that starts on the side of the eye nearest the nos...