Glaucoma normally occurs when a build up of fluid in your eye puts increased stress on the nerve that sends images from your eye to your brain for processing. This elevated pressure causes stress which damages the optic nerve at the back of the eye. The optic nerve is the nerve most responsible in the eye for seeing images. It transmits the images that we see to the brain, where it can be interpreted. 

Glaucoma is recognised as a one of the major eye problems because pressure within the eye occurs because fluid within the eye cannot exit into the bloodstream due to narrow filtering angles within the eye. This causes a build up of fluid in the eye and increased eye pressure. As pressure increases within the eye, it becomes harder, allowing for delicate fibres in the nerve to become damaged.

 Nevertheless, glaucoma is not simply a case of high eye pressure diagnosed by measuring the stress inside your eye. Ninety percent of people with elevated pressure do not have glaucoma, and up to one third of those with glaucoma have normal levels of eye stress. In some men and women the damage towards the optic nerve may well be caused by other aspects which are not yet fully understood.

Whatever the trigger, the risk is that because there are usually no signs or symptoms, the nerve harm can go unnoticed right up until a substantial proportion of sight has been lost. Glaucoma is known as being sneaky since it develops without obvious signs and symptoms. Therefore, the individual with glaucoma is normally unaware they have glaucoma until significant loss of vision has occurred. The truth is, half of individuals suffering harm from glaucoma are unaware they have the illness. As the damage from glaucoma cannot be reversed, early detection, diagnosis, and treatment by your eye doctor is important to preserve your vision.