Glaucoma is one of the main causes of blindness.
1 The disease occurs in 3% to 4% of all people over the age of 70 years.1 As many as 50% of patients suffering from this disease are unaware of their condition until a comparatively late stage, due to the asymptomatic nature of the disease.
2 Of the objective signs of primary open angle glaucoma, the loss of visual field and pathological cupping would generally have reached an advanced stage before they could be recognised by a general practitioner, and aqueous flow can only be measured with the use of specialised equipment. However, increased intra-ocular pressure can easily be detected by tonometry performed by a general practitioner.
3For full text, click here:SA Fam Pract 2006;48(3):16-16