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Patient PortalTrabeculectomy- Filtration
The gold standard for severe glaucoma. Lowest sustained pressures over time. Requires the most intensive follow-up and management.
What is Trabeculectomy?
Trabeculectomy is the most aggressive filtration procedure available for glaucoma. Instead of creating a tiny stent or opening a canal, trabeculectomy surgically removes a small portion of your eye's drainage tissue and creates a permanent opening that allows fluid to drain directly out of your eye.
The surgeon creates a flap under which an opening in the wall of your eye is created allowing aqueous fluid to flow into a reservoir (called a Bleb) under the conjunctiva. This Bleb (Latin for “Blister”) behaves like a sponge to absorb the fluid from the eye and control IOP. Bleb management involves releasing more fluid, reducing scar tissue through medication injections, and removal of scar tissue with in-office procedures. From the bleb, the fluid is absorbed naturally into the body. The result is the most dramatic and sustained pressure reduction available — an average of 6.4 mmHg, or 27% reduction at 12 months in our database.
When is trabeculectomy appropriate? Trabeculectomy is chosen for advanced or refractory glaucoma where the pressure target is very low and earlier procedures have not achieved it. It is appropriate for severe optic nerve damage, advanced visual field loss, or when aggressive pressure control is necessary. It is not a first-line choice but rather a carefully considered escalation.
What To Expect — Before, During, and After
Before your procedure: You will be given IV sedation and a local anesthetic . The surgical team will position you, sterilize your eye, and prepare the surgical field. You may be asleep but more likely or sedated throughout.
During the procedure: The surgeon creates a small opening in the sclera (white of your eye) and removes a small piece of trabecular tissue. A protective flap is created to guard the opening. The incisions are closed with very fine sutures. Total time is 30–45 minutes.
After the procedure: Your eye will be significantly more sensitive than after minor glaucoma surgery. You will experience soreness, swelling, and blurred vision. You will use antibiotics and anti-inflammatory drops for 4–8 weeks. Laser suturelysis to allow the fluid to slowly start flowing out the eye, 5-FU treatments(an anti scarring agent) , and sometimes needling will be performed during follow-up as needed. Trabeculectomy requires a much longer recovery and active bleb management.
Recovery timeline:
- Day 1: Significant discomfort, swelling, vision very blurry. Continue antibiotics and anti-inflammatory drops. Limit activities for 1–2 weeks.
- Week 1: First postop visit. Eye remains sore. Vision still blurry. Close monitoring of bleb. Laser suturelysis and anti-scarring medications (5-FU or mitomycin) may be started.
- Weeks 2, 4, 6, 8: Regular follow-up visits at these intervals. Bleb assessment, laser suturelysis, needling, and anti-scarring treatment as needed. Medication adjustments are common.
- Week 12: Final postop assessment. Bleb has matured. Vision reaches final clarity. Continue drops 4–8 weeks depending on inflammation. Return to routine glaucoma schedule.
Trabeculectomy has the highest complication risk of all glaucoma surgeries. Possible complications include: excessive bleb scarring (most common), infection, hyphema (bleeding), cataract development, visual axis problems, and bleb-related endophthalmitis. Most complications are manageable with timely intervention, but they require awareness and prompt attention.
Your Follow-up Schedule & Bleb Management
Trabeculectomy requires the most intensive follow-up of all glaucoma procedures. The bleb is delicate and must be monitored frequently, especially in the first 6 months.
Bleb management: The first 6 months after trabeculectomy are critical. The bleb can scar down (encapsulation), become overfiltering, or develop infection. We monitor bleb appearance (elevation, vascularity, integrity), eye pressure, and signs of inflammation at every visit.
Bleb-related endophthalmitis: The most serious late complication is bleb infection. While rare, it can occur months or years after surgery. To minimize risk: avoid eye trauma, report any redness or pain immediately, and seek urgent evaluation if you develop sudden vision loss with pain.
Why this matters: Unlike SLT or iStent, trabeculectomy is not "set and forget." The bleb is a permanent opening on the surface of your eye — a pathway for bacteria to enter. Long-term bleb surveillance (for life) is recommended to catch problems early.
Our Outcomes — What EPSAZ Patients Experience
Here is what we see in our database of 298 patients who had trabeculectomy, followed for 5 years:
What these numbers mean: Trabeculectomy achieves the most dramatic and sustained pressure reduction of any procedure — 27% at 12 months. The 5-year average pressure of 9.6 mmHg is exceptional. The safety rating of 1/5 reflects the higher complication risk and management burden, not that trabeculectomy is dangerous, but that it requires more careful post-operative attention than gentler procedures.
Who does well with trabeculectomy? Patients with advanced glaucoma and very low pressure targets. Patients who understand the need for frequent follow-up. Patients motivated to protect the bleb and report problems immediately. Patients who can commit to lifelong bleb monitoring.
What if trabeculectomy does not achieve target? If pressure remains above target even with aggressive management, tube shunt is the final option — for the most refractory cases.