Glaucoma valve

Glaucoma valve is a medical device implanted in the eye to treat glaucoma, a condition that damages the optic nerve and can lead to vision loss or blindness. The valve helps to control intraocular pressure by allowing excess aqueous humor to drain from the eye.

Overview

The glaucoma valve is a small, flexible tube with a silicone flap or valve at one end. It is surgically implanted in the eye, usually in the anterior chamber, and is connected to a reservoir that collects the excess aqueous humor. The valve opens when the intraocular pressure reaches a certain level, allowing the fluid to drain and thereby reducing the pressure.

Indications

A glaucoma valve is used in the treatment of glaucoma, particularly in cases where medication and laser treatments have not been effective. It may also be used in patients with secondary glaucoma, neovascular glaucoma, or pediatric glaucoma.

Procedure

The glaucoma valve implantation procedure is performed under local or general anesthesia. The surgeon makes a small incision in the eye and inserts the valve. The tube is then connected to the reservoir, which is placed under the conjunctiva, the clear tissue covering the white of the eye. The procedure typically takes about an hour.

Risks and Complications

As with any surgical procedure, there are risks associated with glaucoma valve implantation. These may include infection, bleeding, and damage to the eye. There is also a risk that the valve may become blocked or may not function properly, which could lead to a rise in intraocular pressure.

Follow-up Care

After the procedure, patients will need regular follow-up appointments to monitor the function of the glaucoma valve and to check the intraocular pressure. Medication may also be prescribed to help control the pressure and to prevent infection.

See Also

• Glaucoma
• Intraocular pressure
• Aqueous humor
• Optic nerve

Glaucoma valve Resources
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