Blindness with its social and economic consequences is a burden to any society. The etiology of blindness has changed during the 20th century to the present day. Blindness caused by infectious eye diseases is declining today while cataracts, glaucoma and age-dependent macular degeneration are among the most common causes. Glaucoma is a disease characterized by optic neuropathy that over time leads to impaired visual function and irreversible vision loss. Clinically, glaucoma is divided into primary, secondary and congenital. Primary glaucoma is divided into Primary Open-angle Glaucoma (POAG) and Primary Angle-closure Glaucoma (PACG). POAG accounts for 90% of all glaucoma cases in the Western world. It is characterized by a progressive and asymptomatic course, and as many as 50% of patients are not even aware of the disease, while in underdeveloped countries this number rises to 90%. It is the second most common cause of blindness worldwide and poses a major public health problem. Proper diagnosis consists of a detailed history, examination of visual acuity, measurement of intraocular pressure, determination of visual field, measurement of corneal thickness, examination of the ocular angle and examination of optic nerve damage using optical coherence tomography (OCT). Glaucoma therapy consists of antiglaucoma drugs (adrenergic agonists, adrenergic antagonists, carbonic anhydrase inhibitors, parasympathomimetics, prostaglandin derivatives and prostamides, a combination of these drugs), laser therapy (laser iridotomy, laser trabeculoplasty, cybeculoplasty, cybecolaguloplasty, laser trabeculoplasty).