Surgical treatment forreducing intraocular pressure (IOP)
Surgical treatment forreducing intraocular pressure (IOP):
- Combined cataract and glaucoma surgery
- Non Penetrating Glaucoma Surgery: This includesprocedures such as Deep Sclerectomyorviscocanalostomy. Both of these methods are less invasive than filtration surgery and the anterior chamber remains intact.Both involve removal of a deep scleral flap, the external wall of Schlemm's canal and corneal stroma behind the anterior trabeculum and Descemet's membrane, thus creating an intrascleral space.In viscocanalostomy, viscoelastic is injected into Schlemm's canal to make it wider.
- Trabeculectomy: This method is somewhat similar to trabeculectomy. It involves removing part of the trabecular meshwork to allow fluid to flow through the eye's drainage system.This method is usually used to treat congenital glaucoma when the cornea (the transparent part of the iris) is opaque. SinceTrabeculectomy andGoniotomyare less invasive, they are commonly used to treat children.
- Goniotomy: a surgical procedure in which the doctor uses special lensescalled goniolens to viewangles of the eye. This technique is applicable for the treatment of congenital glaucoma if the cornea is not opaque. In this method, a hole is created in trabecular meshwork (a collection of tiny channels located in the drainage angle of the eye) to enhance aqueous outflow.
- Ophthalmicshunt implant:Aqueous shuntssuch as Ahmed Valve and Moltenare small plastic tubes or valves connected from one side to a reservoir which isa round or ovalplate.Shunts are devices that are implantedthrough a small incision in the eye to provide an artificial alternative drainage site for fluid to exit the eye. This tiny tube extends from the body of the device into the anterior chamber, which is the front part of the eye that usually drains fluid from the eye. The excess fluid is absorbed in surrounding tissues by blood vessels.