Activities such as jogging sometimes stir up the pigment granules, depositing them on the trabecular meshwork and causing intermittent pressure elevations.
In pigmentary glaucoma, pigment granules from your iris build up in the drainage channels, slowing or blocking fluid exiting your eye. The optic nerve damage may be caused by drainage blockages or an underlying medical condition. It may be present from birth or develop in the first few years of life. It's possible for infants and children to have glaucoma. This limited blood flow could be caused by atherosclerosis - the buildup of fatty deposits (plaque) in the arteries - or other conditions that impair circulation. You may have a sensitive optic nerve, or you may have less blood being supplied to your optic nerve. In normal-tension glaucoma, your optic nerve becomes damaged even though your eye pressure is within the normal range. Acute angle-closure glaucoma is a medical emergency. Some people have narrow drainage angles, putting them at increased risk of angle-closure glaucoma.Īngle-closure glaucoma may occur suddenly (acute angle-closure glaucoma) or gradually (chronic angle-closure glaucoma). As a result, fluid can't circulate through the eye and pressure increases. Angle-closure glaucomaĪngle-closure glaucoma, also called closed-angle glaucoma, occurs when the iris bulges forward to narrow or block the drainage angle formed by the cornea and iris. It happens so slowly that you may lose vision before you're even aware of a problem. This causes pressure in the eye to gradually increase. The drainage angle formed by the cornea and iris remains open, but the trabecular meshwork is partially blocked. Open-angle glaucoma is the most common form of the disease. Types of glaucoma include: Open-angle glaucoma
In some people, scientists have identified genes related to high eye pressure and optic nerve damage. When fluid is overproduced or the drainage system doesn't work properly, the fluid can't flow out at its normal rate and eye pressure increases. This internal fluid normally drains out through a tissue called the trabecular meshwork at the angle where the iris and cornea meet. For reasons that doctors don't fully understand, this nerve damage is usually related to increased pressure in the eye.Įlevated eye pressure is due to a buildup of a fluid (aqueous humor) that flows throughout the inside of your eye.
As this nerve gradually deteriorates, blind spots develop in your visual field. Glaucoma is the result of damage to the optic nerve. Request an Appointment at Mayo Clinic Causes
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