What We Do

Selective laser trabeculoplasty

What is selective laser trabeculoplasty?

“SLT is a revolutionary new laser therapy for the treatment of open angle glaucoma.”

Selective Laser Trabeculoplasty, or SLT, is a form of 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 may sometimes be used as initial treatment in glaucoma.

Why is it called Selective?

The type of laser used has minimal heat energy absorption because it is only taken up by selected pigmented tissue in the eye. Sometimes it is referred to as a ‘cold laser.’ Because of this, the procedure produces less scar tissue
and has minimal pain.

SLT treatment benefits

SLT reduces or eliminates the need for daily glaucoma medications and their potential side effects.

It allows glaucoma patients to live a normal life and forget about their condition until their next 6 monthly check up.

Your medical history

Your ophthalmologist needs to know your medical history to plan the best treatment for you. Tell your ophthalmologist about health problems you have. Some may interfere with treatment, surgery, recovery or treatment following recovery.

A decision to have treatment

As you consider treatment, make sure that you understand the risks, benefits and limitations associated with the treatment. If you have any questions, ask your ophthalmologist.

Want more information?

Some information within this website has been supplied by The Royal Australian and New Zealand College of Opthamologists (RANZCO). If you would like more information visit www.RANZCO.edu

CALL US ON 06 844 4617


How does it work?

SLT works by using your body’s own immune system to clean out the eyes drainage channels or trabecular meshwork. This allows your eye to drain fluid faster
and thus lower the pressure within.

How is it done?

Our trained ophthalmologist applies low level infrared laser light to your eye using a contact and slitlamp. It can be done in our clinic and takes about 10 minutes per eye.
1. A low power laser is carefully directed into the eye
2. The laser targets melanocytes in trabecular meshwork, increasing fluid outflow
3. Pressure is reduced

What are the risks of SLT?

SLT is extremely safe. Dr Philip Macdonald has pioneered this form laser therapy in New Zealand and has yet to see a significant long term complication.
There is a very small risk of pain, inflammation or a transient rise in intra-ocular pressure.
If SLT fails to work adequately, other forms of glaucoma management or surgery will work equally well.

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