Open-angle glaucoma is the most common type of glaucoma, accounting for at least 90% of all cases. In this type of glaucoma, there is a wide and open angle between the iris and cornea, and the condition develops slowly as the drainage canal ages. As the drainage canals wear out, the Aqueous fluid drains too slowly causing cloggage, which results in increased pressure inside the eye. This is a lifelong condition, occuring more often in older adults, however, younger people can also get this type of glaucoma.
Open-angle glaucoma is the most common type of glaucoma, affecting about three million Americans.