Glaucoma is a group of eye conditions in which the optic nerve (the main nerve that takes visual information from the eye to the brain) becomes damaged. This can be due to a rise in intra-ocular pressure (IOP) but is not always the case. If diagnosed early, treatment can prevent further damage to vision. However, if left untreated, this damage (neuropathy) can ultimately cause blindness.
Glaucoma has been called the “silent thief of sight” because it is gradual and normally asymptomatic until quite advanced.