About this procedure
Glaucoma surgery is considered when further reduction of intraocular pressure is needed and other measures are insufficient or unsuitable. Treatment aims to limit the risk of additional damage to the optic nerve.
What you should know
Trabeculectomy and related filtering operations create another route for fluid drainage. The appropriate operation depends on the glaucoma type, severity of nerve damage, anatomy and expected benefit rather than pressure measurements alone.
Symptoms and reasons for assessment
A person may notice few or no symptoms even while visual-field loss or optic-nerve changes are progressing. The decision about surgery depends on individual risk and the target pressure, not merely on one elevated reading.
Other possible explanations
Filtering surgery for glaucoma is not the same as cataract removal or replacement of the natural lens. Laser trabeculoplasty also works differently and requires a different type of follow-up.
How the condition is assessed
Before recommending surgery, the ophthalmologist reviews intraocular pressure, the drainage angle, optic nerve, OCT and visual fields, as well as other medical conditions and ability to attend follow-up. The benefits, limitations and risks must be discussed.
Treatment and follow-up options
Even successful surgery cannot replace nerve fibres or restore visual field already lost. Drops, repeated assessments or additional treatment may still be necessary. The exact procedure and cost should be confirmed against the individual plan and current price list.
When urgent care is needed
A painful red eye with rapid visual loss, nausea or a severe headache requires immediate medical assessment. Increasing pain, discharge or worsening vision after an operation is also urgent. Call 103 for a life-threatening emergency.
Related health information
Glaucoma; Laser treatment for glaucoma; Optical coherence tomography (OCT) of the eye.
Signs and symptoms
Diagnosis and tests
Care and treatment approaches
When to seek urgent care
Frequently asked questions
Will surgery restore vision already lost to glaucoma?
No. The aim is to control pressure and slow further deterioration, not reverse established optic-nerve damage.
Could laser treatment be used instead of an operation?
Sometimes, depending on disease stage, previous treatment response and the condition of the eye.
Is follow-up needed after successful surgery?
Yes. Ongoing eye-pressure monitoring and checks of the optic nerve and visual field are still important.
Information sources
Medical source links used when preparing this article.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
