Minimally Invasive Glaucoma Surgeries (MIGS)
Understanding MIGS
This section explains what MIGS is and why eye doctors recommend it for many glaucoma patients.
MIGS is a group of surgical techniques that improve the eye’s natural fluid outflow through very small incisions. These methods preserve more of the eye’s normal anatomy and typically achieve about a 20 percent drop in intraocular pressure.
Glaucoma is a leading cause of irreversible vision loss, and controlling pressure inside the eye is the best way to protect sight. MIGS bridges the gap between eye drops or laser treatments and more invasive traditional surgeries, giving patients another chance to reach safe pressure levels.
How MIGS Works
MIGS procedures lower eye pressure by either improving drainage or reducing fluid production inside the eye.
The trabecular meshwork is the eye’s main drainage filter. Certain MIGS devices make it easier for fluid to pass through this tissue.
- Trabecular bypass stents create a direct channel for fluid to enter Schlemm’s canal.
- Goniotomy or trabeculotomy removes small portions of the meshwork that block flow.
Some procedures focus on expanding Schlemm’s canal, the circular channel that carries fluid away from the eye.
- Microcatheter-assisted dilation gently stretches the canal to improve drainage.
- Canaloplasty keeps the canal open with viscoelastic gel for better outflow.
When the natural system is too damaged, certain MIGS devices direct fluid to new areas where it can be absorbed.
- Subconjunctival stents move fluid under the surface layer of the eye.
- Suprachoroidal approaches guide fluid into a space between deeper eye layers.
Endocyclophotocoagulation treats the ciliary body with a laser so the eye produces less fluid, which lowers pressure.
Who Benefits from MIGS
Patient selection is important to ensure the best results from Minimally Invasive Glaucoma Surgeries.
MIGS is most helpful for people who need a moderate pressure reduction or wish to lessen their reliance on drops.
- Patients with mild to moderate primary open-angle glaucoma
- Individuals who struggle with eye drop side effects or daily use
- Patients having cataract surgery who can combine both procedures
For advanced glaucoma that requires very low pressures, more extensive surgeries may still be recommended. Your eye doctor will advise which option safeguards your vision best.
Benefits and Considerations
MIGS offers many advantages, yet ongoing care remains vital for lifelong eye health.
These procedures provide several patient-friendly benefits.
- Less invasive with smaller incisions
- Faster recovery and quicker return to daily tasks
- Reduced dependence on glaucoma medications
- High safety profile with fewer complications
- Can be combined with cataract surgery for added convenience
MIGS manages glaucoma but does not cure it. Regular follow-up visits help monitor eye pressure and adjust treatment as needed to prevent future vision loss.
MIGS Devices and Techniques
Several device families and surgical methods fall under the MIGS umbrella, each targeting a specific part of the eye’s drainage system.
These micro-stents create a direct path from the anterior chamber to Schlemm’s canal.
- iStent and iStent Inject lower pressure when placed during cataract surgery.
- Hydrus Microstent also scaffolds Schlemm’s canal to keep it open.
By removing small sections of the meshwork, these surgeries expand the outflow channel.
- Kahook Dual Blade goniotomy precisely excises tissue with paired incisions.
- Trabectome uses electrocautery to clear a strip of meshwork.
- Gonioscopy Assisted Transluminal Trabeculotomy opens the full 360-degree canal.
These approaches enlarge Schlemm’s canal with viscoelastic material.
- VISCO360 or OMNI System dilates the canal and can add a trabeculotomy.
- Ab Interno Canaloplasty threads a microcatheter 360 degrees for gentle expansion.
When bypassing the conventional pathway is preferred, these implants redirect fluid elsewhere.
- XEN Gel Stent channels fluid into the subconjunctival space.
- New suprachoroidal devices are under study for future use.
Instead of improving drainage, some MIGS procedures limit fluid creation.
- Endocyclophotocoagulation ablates parts of the ciliary body to lower production.
Frequently Asked Questions
The answers below address common concerns about MIGS.
No. MIGS involves tiny implants or surgical techniques through small incisions, while laser procedures use light energy without placing devices or making cuts.
MIGS slows disease progression by lowering eye pressure, but glaucoma remains a lifelong condition that still needs regular monitoring.
Many patients enjoy lower pressure for several years, sometimes longer. Individual results depend on glaucoma severity, healing response, and follow-up care.
Your eye doctor will schedule routine visits to check pressure, watch for complications, and adjust any eye drops. Some patients reduce or stop medications, while others continue at lower doses.
Patients with mild to moderate open-angle glaucoma who need better pressure control or wish to lessen medication use are good candidates. A detailed exam will confirm if MIGS fits your condition.
Caring for Your Vision
Our eye care team is committed to protecting your sight with the most advanced glaucoma treatments available, including MIGS. If you have questions or think you may benefit from this approach, we are here to guide you toward the best solution for your eye health.
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