Type of Surgery
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Last updated: 02/17/2009
Normal results of cyclocryotherapy would be a reduction in the IOP and decreased intraocular pain. The overall success rate of CCT to reduce IOP in glaucoma patients is reported to be from 34% to 92%. Approximately 70% of patients with neovascular...
glaucoma have an IOP reduction of at least 50%. A determination of whether or not the surgery has been effective may not be clear until a month after CCT is performed; retreatment is required in up to one-third of adult patients. Repeated procedures increase the success of the surgery. CCT is successful in 90% of patients after a second surgery and in 95% after the third treatment. Among pediatric patients who undergo CCT, the success rate is only 30–44%, as the ciliary body of the child is more resistant to damage by cryotherapy, and thus repeat applications are more common.
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Cyclocryotherapy (CCT) is a procedure that employs temperatures as low as -112°F (-80°C) to destroy the ciliary body, an organ in the anterior chamber of the eye behind the iris, which produces aqueous fluid. A certain amount of fluid is required to maintain the integrity of the eye, but an increase in intraocular fluid leads to an elevation in intraocular pressure (IOP); elevated IOP is a major cause of glaucoma. Ablation, or destruction, of part of the ciliary body lowers the IOP by decreasing the fluid or aqueous humor within the eye and thus helping to control glaucoma. The main purpose of CCT is to treat uncontrolled or refractory glaucoma. It is also used to reduce ocular pain in some patients with end-stage glaucoma.
From http://www.enotes.com/surgery-encyclopedia/cyclocryotherapy
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Approximately 56% of all patients achieve results of 20/20 or better and over 90% achieve 20/40 or better (which is good enough to drive without corrective lenses in most regions).1 Those with moderate to high myopia (greater than 7 diopters) have a lesser chance of achieving that result. As technique and technology improve, the results continue to improve.
From: Eye Surgery Education Council
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