Open-Angle Glaucoma



Open-Angle Glaucoma

iStent Clinical TrialsIt is estimated that over two million Americans have some type of glaucoma and half of them do not know it. Ninety percent of glaucoma patients have open-angle glaucoma. Although it cannot be cured, it can usually be controlled. Vision loss may be minimized with early treatment. The eye receives its nourishment from a clear fluid that circulates inside the eye. This fluid must be constantly returned to the blood stream through the eye's drainage canal, called the trabecular meshwork. In the case of open-angle glaucoma, something has gone wrong with the drainage canal. When the fluid cannot drain fast enough, pressure inside the eye begins to build. This excess fluid pressure pushes against the delicate optic nerve that connects the eye to the brain. If the pressure remains too high for too long, irreversible vision loss can occur.

Symptoms of open-angle glaucoma:

  • In the early stages, there are no symptoms. There is no pain or outward sign of trouble.
  • Mild aching in the eyes
  • Gradual loss of peripheral vision (the top, sides and bottom areas of vision)
  • Seeing halos around lights
  • Reduced visual acuity (especially at night, that is not correctable with glasses)

Who is at risk

Glaucoma can occur in people of all races at any age. However, the likelihood of developing glaucoma increases if you:

  • are African American
  • have a relative with glaucoma
  • are diabetic
  • are very nearsighted
  • are over 35 years of age

Treatments for open-angle glaucoma:

Glaucoma MiamiTo control glaucoma, your doctor will use one of three basic types of treatment: medicines, laser surgery, or filtration surgery. The goal of treatment is to lower the pressure in the eye.

Medicines come in pill and eye drop form. They work by either slowing the production of fluid within the eye or by improving the flow through the drainage meshwork. To be effective, most glaucoma medications must be taken between one to four times every day, without fail. Some of these medications have some undesirable side effects, so your doctor will work with you to find a medication that controls your pressure with the least amount of side effects. Medicines should never be stopped without consulting your doctor, and you should notify all of your other doctors about the medications you are taking.

Argon Laser Trabeculoplasty and Selective Laser Trabeculoplasty surgeries treat the drainage canal. Requiring only numbing eye drops, the laser beam is applied to the trabecular meshwork resulting in an improved rate of drainage. When laser surgery is successful, it may reduce the need for daily medications.

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