Glaucoma drainage implant surgery uses a small tube connected to a plate beneath the conjunctiva to create an alternative pathway for aqueous humour to leave the eye. This helps lower eye pressure and reduce the risk of further optic nerve damage in patients with severe glaucoma.
Glaucoma is a condition that causes progressive damage to the optic nerve, often associated with increased pressure inside the eye. In many cases, glaucoma develops without noticeable symptoms, which is why regular eye examinations are important for early detection. Some patients experience mild eye discomfort or a sensation of pressure around the eyes, while more advanced disease can lead to gradual peripheral vision loss.
Acute glaucoma presents differently and causes a sudden rise in eye pressure, requiring urgent and immediate treatment. Symptoms include:
Learn more about glaucoma, including its types and causes here.
Glaucoma drainage implants lower eye pressure by creating an alternative pathway for the aqueous humour to leave the eye. Implants such as the PAUL®, Ahmed®, and Baerveldt® Glaucoma Implant use a fine silicone tube connected to a plate positioned beneath the conjunctiva. Fluid travels through the tube and collects around the plate, where it is gradually absorbed by the surrounding tissues.
This procedure is performed under general anaesthesia. The implant plate is positioned beneath the conjunctiva and eye muscles, while the silicone tube is inserted into the front chamber of the eye to allow the aqueous humour to drain. Drainage will improve gradually as the eye heals and tissue forms around the plate.
After surgery, the vision is temporarily blurred and the eye might feel mildly sore, irritated or watery. Eye drops are prescribed during the recovery period, and regular follow-up visits are arranged to monitor eye pressure, healing and the position of the tube. Treatment can be adjusted during follow-up as the eye settles and the pressure stabilises.
From your initial consultation to treatment and follow-up care, our team will guide you through every stage of your journey. We will take the time to explain your condition, answer your questions and help you feel informed and supported throughout your care.
Your consultation begins with a detailed assessment of your vision and eye health. Depending on your condition, this may include measurements of your vision and eye pressure, examination of the front and back of the eye, and advanced diagnostic imaging.
Our team will guide you through each test and explain what is being assessed. Your results will then be carefully reviewed to understand your individual needs and determine whether monitoring or treatment may be recommended.
Every eye and every patient is different. Your treatment plan will be tailored according to your examination findings, visual needs, general health and lifestyle.
We will explain the recommended treatment, its expected benefits, possible risks and any suitable alternatives in a clear and straightforward manner. You will have time to ask questions and consider your options before deciding how you would like to proceed.
Before your treatment, our team will guide you through the necessary preparations, paperwork and medication instructions. Where applicable, we will explain how to use your prescribed eye drops and how to care for your eyes afterwards.
We understand that undergoing a procedure can feel unfamiliar or worrying. Our team will be available to answer your questions and ensure that you know what to expect before the day of your treatment.
On the day of your procedure, you will arrive at the hospital or surgical centre where your operation has been scheduled. The surgical team will help you prepare and explain what will happen at each stage.
Anaesthetic eye drops or other forms of anaesthesia may be used, depending on the procedure, to keep you comfortable. Your doctor and the surgical team will support and reassure you throughout the operation.
Most eye surgeries are performed as day procedures, although the duration and recovery process will depend on the treatment you receive. Your vision may be temporarily blurred afterwards, so you should arrange for someone to accompany you home and should not drive unless your doctor has advised that it is safe to do so.
We will provide clear instructions on how to care for your eyes, use any prescribed medication and manage your activities during recovery. We will also explain which symptoms are expected and when you should contact the clinic for further advice.
Follow-up appointments allow us to monitor your vision, assess your recovery and identify any concerns at an early stage. Our team remains accessible should you have any questions or concerns throughout your recovery.
Glaucoma drainage implants provide an alternative pathway for fluid to leave the eye, helping to lower eye pressure when other treatments have not provided sufficient control. We assess the severity of your glaucoma and overall eye health to determine whether a drainage implant is suitable for you.
Book a consultation with us to discuss whether a glaucoma drainage implant is appropriate for your condition and long-term pressure control.
A glaucoma drainage implant is recommended when the eye pressure needs to be lowered further to protect the optic nerve. It is often used when previous treatments have not provided enough pressure control or when another form of glaucoma surgery is less suitable for the eye.
A small drainage tube is placed inside the eye and connected to a plate positioned beneath the surface tissues of the eye. The tube redirects fluid from inside the eye towards the plate, where it is absorbed by the surrounding tissues and helps lower eye pressure.
No. The implant sits beneath the tissues around the eye and is not normally felt once the eye has healed. The tube and plate are positioned so that they do not interfere with normal blinking or everyday eye movements.
Anaesthesia is used to keep the eye comfortable throughout the operation. Mild soreness, irritation or a gritty sensation is expected during the early recovery period, and pain relief is provided when needed.
Yes. Glaucoma drainage implant surgery is generally performed under local anaesthesia with sedation, so you remain awake but relaxed and comfortable throughout the procedure.
The operation generally takes around one to two hours. The exact duration depends on the condition of the eye and whether any additional treatment is required during the same procedure.
Glaucoma drainage implant surgery is generally performed as day surgery. You will be monitored after the procedure before returning home.
Vision is blurred during the early recovery period because of inflammation, eye drops and changes in eye pressure. It gradually clears as the eye heals and the pressure settles.
The eye heals over several weeks. Eye pressure also changes during this period as the tissues around the implant settle, so regular follow-up is important throughout the early recovery period.
The purpose of the implant is to lower eye pressure and protect the vision you still have. It does not restore vision that has already been lost from glaucoma.
Some patients require fewer pressure-lowering drops after surgery, while others continue using medication to maintain the required eye pressure. We adjust your treatment according to how the pressure responds after surgery.
Follow-up allows us to monitor the eye pressure, check the position and function of the implant and make sure the eye is healing properly. The pressure can change during the first few weeks and months, so closer monitoring is important during this period.
Avoid rubbing the eye, swimming, strenuous exercise and heavy lifting while the eye heals. Keep water, dust and other contaminants away from the eye during the early recovery period. We will let you know when these activities can be resumed.
Risks include infection, bleeding, inflammation, eye pressure becoming too high or too low, blockage or movement of the tube and changes in vision. Further treatment or surgery is required in some cases if the implant does not provide sufficient pressure control.
Yes. Changes in healing or scar tissue around the implant can affect drainage over time. Regular follow-up allows us to identify changes in pressure and provide additional treatment when needed.
