
What glaucoma does inside the eye.
In a healthy eye, a clear fluid called aqueous humor flows in and out of the anterior chamber in the front of the eye, nourishing surrounding tissue. The fluid exits the chamber through the drainage angle, where the cornea and the iris meet. It drains through spongy tissue called the trabecular meshwork before leaving the eye.
If the eye is unable to properly drain fluid, the pressure inside the eye (i.e., intraocular pressure) can rise. This gradually threatens the health of the optic nerve, which is a bundle of nerve fibers that transmit information from the eye to the brain.
Detection is everything — glaucoma gives few warnings.
As mentioned, with cases of open-angle glaucoma, there are very few obvious visual symptoms at first. Gradually, blind spots can develop in peripheral, or side, vision. Usually open-angle glaucoma is left undetected until the damage is very severe. Increases in intraocular pressure can be detected during eye exams, which is why ophthalmologists encourage older adults at a higher risk of developing glaucoma to have regular exams.
On the other hand, angle-closure glaucoma develops quickly, causing symptoms that can include the following:
Symptoms of angle-closure glaucoma
Very blurry vision
Severe eye pain
Nausea and vomiting
Headache
Rainbow-colored rings or halos around lights
How we test for glaucoma
Dilated eye exam
The patient’s pupils are dilated (opened) so the doctor can take a magnified view at the internal structures of the eye. During the exam, the doctor uses a special magnifying device to look at the optic nerve’s shape, size, color, depth and vessel for any signs of damage due to glaucoma. The doctor may take photographs of the optic nerve, which are useful for monitoring the progression of glaucoma.
Visual field test
The visual field test determines whether the patient has lost any peripheral vision to glaucoma (if so, the test can measure how much and exactly where vision has been lost).
Eye pressure check
Also known as tonometry, this test determines the pressure inside the eye by measuring the force with which the eye pushes back against a sensor.
Gonioscopy
A special mirror allows the doctor to examine the area where the cornea meets the iris internally, which is called the “angle.” Whether the angle is wide open or closed determines the basic type of glaucoma (open angle glaucoma vs. angle closure glaucoma).
Pachymetry, or corneal thickness test
The thickness of the cornea can affect eye pressure readings. For any given pressure inside the eye, the thicker the cornea, the higher the measured pressure will be during the eye pressure check.
Lowering the pressure, protecting the nerve.
Practically speaking, efforts to treat glaucoma are focused on lowering intraocular pressure. This can be accomplished by reducing the amount of fluid the eye produces or increasing the amount of fluid that exits the eye.
In broad terms, the treatment types available are:
Eyedrops
Laser Procedures
Surgical Procedures
At Access Eye we offer treatments within each category. When appropriate, we can combine two different treatment modalities, such as laser or traditional surgery with the use of medicated eyedrops, for the best results. In more advanced cases, we can utilize a number of referral resources.
Common questions, answered.
Is glaucoma painful?
Can glaucoma cause blindness?
How is glaucoma treated?
How is glaucoma treated with medications?
How is glaucoma treated with a laser?
How is glaucoma treated surgically?
How much do glaucoma treatments cost?
Can glaucoma be cured?
The surest way to catch glaucoma early is a regular eye exam.
Glaucoma often has no early warning signs. A comprehensive exam measures your eye pressure and checks the optic nerve — catching changes before they affect your sight.
Schedule an Eye Exam