Is it safer than trabeculectomy?

It usually has a safer and faster recovery profile. It also tends to lower pressure less than trabeculectomy [2] .

Can it be done without cataract surgery?

Sometimes. Some procedures can stand alone, while others are commonly paired with cataract surgery.

Will I stop glaucoma drops?

Maybe. Many people use fewer drops, but some still need drops to stay at target pressure.

Who is not a good candidate?

It may not fit advanced glaucoma, closed angles, active inflammation, cloudy corneas, or eyes needing very low pressure.

Treatment

Minimally Invasive Glaucoma Surgery

Also known as MIGS, Micro-Invasive Glaucoma Surgery, Glaucoma Stent Surgery, Angle-Based Glaucoma Surgery, Trabecular Bypass Surgery

Updated May 16, 2026·For educational purposes only. Not a substitute for medical advice. See our terms.

Bottom Line

Minimally invasive glaucoma surgery uses small internal procedures to lower eye pressure. It is usually for mild to moderate glaucoma, often during cataract surgery.

Minimally invasive glaucoma surgery (MIGS) is a group of small glaucoma procedures. Most are done through tiny clear cornea incisions and aim to improve fluid outflow ¹.

These procedures usually have a faster recovery and safer profile than trabeculectomy or tube surgery. They also tend to lower pressure less than those bigger surgeries ².

Many minimally invasive glaucoma surgery procedures are used during cataract surgery. The goal is often to reduce drops and modestly lower pressure ³.

Main Types

Minimally invasive glaucoma surgery (MIGS) is not one single operation. Your surgeon chooses based on anatomy, cataract status, and pressure goal ¹.

Tiny bypass stents. These help fluid enter the natural drain.
Canal scaffolds. These hold part of the drain open.
Goniotomy. This removes or opens the inner wall of the drain.
Canaloplasty. This widens the circular drain around the iris.
Subconjunctival devices. These send fluid under the outer eye lining.

Limits And Risks

Minimally invasive glaucoma surgery (MIGS) is usually not the strongest option for very advanced glaucoma. Trabeculectomy or a drainage implant can lower pressure more, but with more recovery and risk ².

Risks vary by device. They can include bleeding, inflammation, pressure spikes, scarring, device blockage, cornea injury, or need for more surgery.

Cost And Insurance

Coverage depends on the device, diagnosis, cataract surgery plan, and insurer policy. Some procedures are covered only for certain glaucoma types.

Ask the practice which billing codes are planned. Also ask whether the estimate includes the device, surgeon, facility, anesthesia, and follow-up visits.

Common Questions About Minimally Invasive Glaucoma Surgery

No. It lowers pressure or reduces drops. You still need lifelong glaucoma monitoring.

Next Steps

1Ask your glaucoma surgeon which exact procedure they recommend and why.
2Confirm whether it will be combined with cataract surgery.
3Review your pressure target and whether a stronger surgery may be needed.
4Ask how many drops you may still need after surgery.
5Get a written estimate that includes device, facility, anesthesia, and follow-up costs.

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