A treatment for primary open angle glaucoma

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A simpler way to manage your glaucoma

This guide will provide information on how PRESERFLO MicroShunt helps treat glaucoma and what to expect before, during, and after surgery

Close up picture of a human eye showing the iris and pupil

What is glaucoma?

Glaucoma is a group of eye diseases commonly caused by an increased pressure inside the eye caused by a buildup of excess fluid. Treatment is aimed at lowering pressure to prevent further vision loss.

Diagram of an eye showing what happens in glaucoma

What causes glaucoma?

Normally, fluid is circulated in the eye to maintain healthy ocular pressure. If fluid does not drain properly, it builds up and raises the pressure inside your eye. This may damage the delicate optic nerve, which carries images from our eye to our brain, potentially leading to permanent vision loss.

Man using eye drops for glaucoma

Eye drops aren't always enough

Eye drops don't always reduce the pressure to the low levels needed to help prevent vision loss. This is why surgery may be recommended.

The PRESERFLO MicroShunt is intended to reduce eye pressure in people with primary open angle glaucoma where eye pressure is uncontrolled despite maximum tolerated eye drops or where glaucoma progression warrants surgery.

Introducing the PRESERFLO MicroShunt for Glaucoma

An effective treatment for glaucoma.

Picture of the PreserFlo MicroShunt stent

What is PRESERFLO MicroShunt?

PRESERFLO MicroShunt is a tiny, soft, flexible stent that helps your eye drain excess fluid, may lower eye pressure, and prevent further vision loss. 

Diagram showing the position of the PRESERFLO MicroShunt in the eye

How does it work?

PRESERFLO MicroShunt is a permanent treatment option for the management of glaucoma to help drain excess fluid out of the eye.

One end is inserted into the front chamber of the eye, where excess fluid resides. The other end is tucked under the clear membrane surrounding the eye to help drain excess fluid.

Is PRESERFLO MicroShunt right for me?

PRESERFLO MicroShunt is implanted during an outpatient surgical procedure under anaesthesia. The procedure is less invasive than traditional glaucoma surgeries and may take less time to complete. 

The PRESERFLO MicroShunt is a new and exciting development in the field of glaucoma surgery, and it offers many advantages over traditional surgery.

Picture of Dr Nathan Kerr
Dr Nathan Kerr
Melbourne Glaucoma Specialist Surgeon


  • Lowers eye pressure
  • Less invasive
  • Faster recovery
  • Designed to be safer
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What are the benefits of PRESERFLO MicroShunt?

It is necessary to first undergo an eye examination to determine if you are eligible for the PRESERFLO MicroShunt. However, if you are suitable, the PRESERFLO MicroShunt may be an effective way to manage your glaucoma.

Designed to lower eye pressure

PRESERFLO MicroShunt is designed to drain excess fluid from your eye, which may lower eye pressure and prevent further vision loss. 

Fewer Medications

In the pivotal study, the majority of PRESERFLO MicroShunt patients were medication-free at 12 months. 

Fewer Complications

Compared with traditional glaucoma surgeries, PRESERFLO MicroShunt may result in fewer complications after surgery.

Faster recovery

The PRESERFLO MicroShunt is a new type of glaucoma surgery that promises faster recovery times than traditional surgery.

Experienced PRESERFLO Surgeon

Dr Nathan Kerr is one of Australia's most experienced PRESERFLO surgeons, first performing the procedure in 2016.

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Picture of Dr Nathan Kerr, Cataract Surgeon in Melbourne

Frequently asked questions

Discover if PRESERFLO MicroShunt is right for you.

What is PRESERFLO MicroShunt?

PRESERFLO MicroShunt is a type of glaucoma surgery. It is a minimally invasive glaucoma surgery (MIGS) that can be used to treat open-angle glaucoma. The surgery involves placing a tiny shunt in the eye to help drain excess fluid and pressure.

How does PRESERFLO MicroShunt work?

The PRESERFLO MicroShunt works by creating a small opening in the eye to allow drainage of excess fluid. This helps to reduce intraocular pressure (IOP), which can damage the optic nerve and lead to vision loss.

Who is suitable for PRESERFLO MicroShunt?

PRESERFLO MicroShunt is suitable for patients with open-angle glaucoma who have failed to respond to medical treatment.

What are the benefits of PRESERFLO MicroShunt?

The benefits of the PRESERFLO MicroShunt are that it can help to improve the drainage of fluid in the eye, which can help to reduce pressure in the eye.

What does PRESERFLO MicroShunt operation involve?

The operation involves placing a small tube (shunt) in the eye to help improve the drainage of fluid. The shunt is placed in the front part of the eye, where excess fluid is located.

How soon will I recover after PRESERFLO MicroShunt?

Most people will recover within a few days after the operation. You may experience some discomfort and blurred vision for a short time after the operation.

How long will PRESERFLO MicroShunt last?

The PRESERFLO MicroShunt is designed to last for many years. However, it is possible that it may need to be replaced or revised at some point if it becomes blocked or starts to leak.

Will I still need to use glaucoma drops?

You may still need to use glaucoma drops after the operation, but this will be decided on a case-by-case basis.

What are the risks?

Serious problems such as bleeding or infection are fortunately rare.

There are some risks associated with the PRESERFLO MicroShunt, as with any operation. These include the risks of infection, bleeding, and damage to the cornea.

What are the alternatives?

The alternatives to the PRESERFLO MicroShunt include other glaucoma surgery procedures, such as XEN, trabeculectomy, and drainage implants.

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Australia's First

Dr Nathan Kerr was the first Australian surgeon to be certified in the use of PRESERFLO MicroShunt.

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Find out if PRESERFLO is right for you