Glaucoma is a group of eye diseases causing optic nerve damage. The optic nerve carries images from the retina, which is the specialized light sensing tissue, to the brain so we can see. In glaucoma, eye pressure plays a role in damaging the delicate nerve fibers of the optic nerve. When a significant number of nerve fibers are damaged, blind spots develop in the field of vision. Once nerve damage and visual loss occur, it is permanent. Most people don’t notice these blind areas until much of the optic nerve damage has already occurred. If the entire nerve is destroyed, blindness results.
Glaucoma is a leading cause of blindness in the world, especially in older people. Early detection and glaucoma treatment by your ophthalmologist are the keys to preventing optic nerve damage and vision loss from glaucoma. The exact causes of optic nerve damage from glaucoma is not fully understood, but involves mechanical compression and/or decreased blood flow of the optic nerve. Although high eye pressure sometimes leads to glaucoma, many people can also develop glaucoma with “normal” eye pressure. There are various types of Glaucoma, most commonly, Open Angle Glaucoma or Narrow Angle Glaucoma.
Listed are the most common warning signs Glaucoma: