Ophthalmic lasers allow precise treatment of a range of eye problems with little risk of infection. Many laser eye surgery procedures are relatively pain free and can be performed on an outpatient basis. The combination of safety, accuracy, and relative low cost make lasers very useful ophthalmic tools.
The word laser is an acronym for ‘light amplification by stimulated emission of radiation’. Laser light is coherent (the waves are in phase in space and time), monochromatic (just one colour or wavelength), and collimated (light is emitted as a narrow beam in a specific direction).
Different types of lasers emit specific wavelengths of light and are used to treat specific eye problems.
The effects that lasers have on eye tissues are both a function of the molecular composition of the tissue and of the wavelength and power of the laser light. Lasers essentially destroy tissue in order to have a beneficial effect on the eye.
Cyclodiode laser treatment is used in the treatment of glaucoma that is difficult to control. The laser is applied to the ciliary body in the eye, which reduces the production of fluid (aqueous humour) and can keeps the pressure low. Cyclodiode is highly successful in providing pain relief in painful blind glaucomatous eyes with high pressures.
Selective Laser Trabeculoplasty
Selective Laser Trabeculoplasty, or SLT, is a form of eye laser surgery that is used to lower intraocular pressure in glaucoma.
It is used when eye drop medications are not lowering the eye pressure enough or are causing significant side effects. It can also be used as initial treatment in glaucoma. SLT has been in use for more than 25 years in the United States and around the world.
YAG Peripheral Iridotomy
A YAG laser peripheral iridotomy is performed almost exclusively for patients with narrow angles, narrow angle glaucoma, or acute angle closure glaucoma. Aqueous fluid is made in the ciliary body of the eye, which is situated behind the iris. The aqueous fluid primarily escapes the eye by flowing between the lens and iris of the eye, and then drains via the trabecular meshwork, which is located in the angle of the eye (where the front clear cornea meets the iris, essentially). If the flow of aqueous fluid to the drainage angle is obstructed by a forwardly bowed iris, the patient is said to have narrow angles
Argon Laser Iridoplasty
Laser iridoplasty ( eye laser surgery ) is a safe and effective technique for relieving appositional angle closure such as plateau iris, nanophthalmos (congenital small eyes), and iris cysts. In these cases, crowding of the angles were drainage takes place blocks aqueous outflow. In plateau iris, there may also be a component of pupillary block, which is initially treated with iridotomy; the residual areas of persistent narrowing are then widened with iridoplasty. It contributes to the success of other procedures such as iridotomy and trabeculoplasty and provides definitive treatment for select conditions. Your specialist will advice you if this procedure will suit you.
Micropulse Transcleral Cyclophotocoagulation
TSCPC is a safe and effective treatment modality we can utilise at all disease stages of glaucoma, whether as a standalone procedure or in conjunction with standard treatment therapies including minimally invasive glaucoma surgery (MIGS) or trabeculectomy/viscocanalostomy.
The technique micropulse TSCPC utilises a different delivery modality than its predecessor, Cyclodiode laser , to produce a biological reaction without the lethal effects caused by thermal buildup. Despite a gentler laser application, the treatment remains efficacious at lowering IOP. The procedure is carried out in theatre as a day case procedure under local anaesthetic.
Laser goniopuncture is a complementary procedure adjunct to glaucoma surgery such as deep sclerectomy, viscocanalostomy. It helps to lower intraocular pressure control and the avoidance of additional surgery requiring attendance to theratre. Goniopuncture is associated with a low complication rate and demonstrates minimal inflammation, bleeding, and low pressures when performed correctly.
The goal of the laser treatment ( eye laser surgery) is to create a small hole in the window created during surgery to allow direct passage of aqueous humour from the anterior chamber to the filtration bleb. It is usually a onetime procedure performed anytime after 8 weeks of surgery when the specialist feels that the pressure in the eye is increasing and there is evidence of scarring in the operated site reducing drainage.35% of the patients undergoing viscocanalostomy will require this laser within the first one year.
During photocoagulation, your eye surgeon numbs your eye with anesthetic eyedrops. The laser is then focused over the retinal tear or small detachment. The laser emits a beam of light that travels through the eye and burns the area around the retinal tear or detachment to create a scar. This scar tissue helps seal the tear or reattach a detached portion of retina to underlying tissue. With retinal tears, the procedure prevents fluid from traveling underneath the retina, where it can cause detachment.
After this relatively painless procedure, your surgeon may administer a topical steroid to prevent inflammation. He or she may recommend bed rest for the first few days and suggest that you refrain from strenuous activities to allow the scars to form and your eye to heal.
YAG Capsulotomy is the treatment for PCO (Posterior capsule thickening). PCO is a thickening of the lens capsule (which is the cradle that supports the intraocular lens implant following cataract surgery).
Thickening of the capsule is a common occurrence after cataract surgery and can occur from months to years after an uneventful surgery.
This thickening causes and irregular surface of the capsule thereby causing light to scatter, which ultimately blurs your vision.
The procedure includes the use of a laser beam to create a vent in the capsule so that the light rays pass through, unimpeded and improves your vision.
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