"Glaucoma is the name given to a group of eye diseases where vision is lost due to damage to the optic nerve. Generally there are no symptoms or warning signs in the early stages of this eye condition. The loss of sight is usually gradual and a considerable amount of peripheral (side) vision may be lost before there is an awareness of any problem"
Glaucoma is not a disease that can be self-detected, and many people that have glaucoma may not be aware of any vision loss.
It is important to remember that while it is more common in the older population, glaucoma can occur at any age.
Once vision is lost it cannot be regained.
Glaucoma as mentioned is a group of diseases that results in a pressure increase within the eye.In basic terms this increase can be due to the excess production of fluid (aqueous) that is unable to drain from the eye fast enough or there might be a blockage within the drainage area that doesn't allow drainage. The inadequate drainage of fluid increases the pressure of the eye and this puts strain on the optic nerves resulting in damage that is irreversible.