Chronic Simple Glaucoma
Because this type occurs gradually and there is no pain or evident loss of visual acuity in the early stages, it causes more blindness word-wide than any other disease. It affects perhaps as many as 2% of the population over the age of 40 years, with the highest incidence after 60 years. This disease is inherited by approximately 10% of all children whose parents are known to be affected. Symptoms are gradual loss of close-up vision but occurring more quickly than presbyopia, and partial loss of visual field, noticeable because the patient frequently bumps into objects.
Science EncyclopediaScience & Philosophy: Verbena Family (Verbenaceae) - Tropical Hardwoods In The Verbena Family to WelfarismVision Disorders - Refractive Errors, Hyperopia/presbyopia, Other Refractive Errors, Strabismus, Nonparalytic Strabismus, Paralytic Strabismus - Myopia, Astigmatism, Glaucoma, Secondary glaucomas, Degeneration of the macula, Retinal dystrophies