Posted by: Heaton Eye Associates in Blog,Glaucoma

Minimally invasive glaucoma surgery, usually shortened to MIGS, is a group of procedures that lower eye pressure through incisions so small they often measure less than a millimeter. Using microscopic devices and instruments, a surgeon improves the eye’s natural fluid drainage while disturbing far less tissue than traditional glaucoma operations.

For most patients, that means a quicker, gentler recovery and another line of defense against a disease that causes permanent vision loss when left untreated.

If your eye doctor has mentioned MIGS, or if drops alone are not controlling your pressure, here is what these procedures involve and how to find out whether one might fit your situation.

What Does “Minimally Invasive” Mean?

For decades, glaucoma surgery meant procedures like trabeculectomy, in which the surgeon creates a new drainage flap in the wall of the eye, or tube shunt surgery, in which a small silicone tube carries fluid to a spot in the eye where the body reabsorbs it. Both treatment options remain valuable, and both can achieve significant pressure reduction. However, they also involve more tissue manipulation, longer healing, and closer postoperative monitoring, which is why they are generally reserved for more advanced disease.

MIGS, on the other hand, allows the surgeon to work through micro-incisions, often at the edge of the cornea, and spares the delicate outer tissues of the eye.

MIGS procedures are performed on an outpatient basis, frequently take only minutes to complete, and let most patients return to normal activities much sooner. The trade-off is that MIGS typically produces a more modest pressure reduction than traditional surgery, which is exactly why matching the procedure to the stage of your glaucoma matters so much.

How Does MIGS Lower Eye Pressure?

Your eye constantly produces a clear fluid called aqueous humor, which normally drains through a spongy structure called the trabecular meshwork into a channel that returns it to the bloodstream. In the most common form of glaucoma, called open-angle glaucoma, that drain becomes less efficient. Fluid backs up, pressure inside the eye rises, and the optic nerve slowly sustains damage you cannot feel. Every MIGS procedure targets this plumbing problem, either by opening the natural drain or by creating a tiny bypass so fluid can exit the eye more easily.

Which MIGS Procedures Does Heaton Eye Associates Offer?

At Heaton Eye Associates, our glaucoma specialists provide advanced glaucoma treatment options that include multiple MIGS procedures alongside medications, laser treatment, and traditional surgery.

We are proud to have a multi-specialty team that includes two fellowship-trained glaucoma specialists: Dr. Adam Dossey, who focuses on micro-incision glaucoma surgery and believes minimally invasive techniques are the future of the field, and Dr. Logan Vincent, who manages glaucoma both medically and surgically.

Depending on your glaucoma, your surgeon may recommend one of these MIGS procedures:

iStent

The iStent is the smallest medical device ever approved by the FDA. A surgeon places this tiny implant in the eye, typically during cataract surgery, where it creates a permanent opening in the trabecular meshwork. From that point on, it works continuously to improve fluid outflow and help control pressure.

ABiC

ABiC, short for ab interno canaloplasty, is unique among MIGS procedures because it restores the eye’s own drainage system rather than creating a new pathway. Using a microcatheter called iTrack, the surgeon gently opens the existing drainage channels, addressing several points of resistance where fluid outflow slows down.

Kahook Dual Blade

The Kahook Dual Blade is a single-use instrument that makes precise, targeted incisions in the trabecular meshwork, removing a portion of the tissue that restricts drainage. The procedure is quick, typically performed at the same time as cataract surgery, and recovery is faster than with most other glaucoma treatments.

GATT with the OMNI Device

Gonioscopy-assisted transluminal trabeculotomy, or GATT, treats open-angle glaucoma in both adults and children. First, visco-canaloplasty dilates the entire 360 degrees of Schlemm’s canal so the drainage channels can function better. Then a portion of the trabecular meshwork is removed, giving fluid direct access to drain into the canal.

Can MIGS Be Done During Cataract Surgery?

Several MIGS procedures were designed for exactly this pairing. Glaucoma and cataracts often develop in the same season of life, so treating both in one operation means a single anesthesia, a single trip to the operating room, and a single recovery period.

During cataract surgery, the cloudy natural lens is removed and replaced with an artificial lens implant, and the surgeon can place an iStent or use the Kahook Dual Blade through the same tiny incision approach. Combining procedures does not mean compromising on the vision side, either.

Who Is a Good Candidate for MIGS?

MIGS can be a good option for patients with mild to moderate open-angle glaucoma, especially those whose pressure is not adequately controlled with drops, those who struggle with drop schedules or side effects, and those already planning cataract surgery.

Patients with advanced glaucoma may still be better served by traditional surgery, and only a thorough evaluation with a glaucoma specialist can determine which path protects your vision best.

Many people also assume glaucoma only affects older adults. It does not. Glaucoma can occur at any age, and the risk of developing the disease rises significantly after age 35. Younger patients who are diagnosed early often have the most to gain from treatment options that preserve tissue and keep future surgical choices open, which is one reason minimally invasive approaches have generated so much interest.

Will I Still Need Eye Drops After MIGS?

The answer to this question is maybe. Many patients are able to reduce the number of drops they use after MIGS, and some can stop altogether, but others continue with a simplified regimen. The goal of any glaucoma treatment is stable, protected vision rather than a specific number of medications. New procedures and sustained-release medications are steadily reducing some patients’ dependence on daily drops while still protecting their sight.

How Do You Find Out if MIGS Is Right for You?

Because the most common form of glaucoma produces no pain and no early warning signs, most cases are first detected during a comprehensive eye exam that includes eye pressure measurement and field of vision testing. If glaucoma is found, your doctor will map out how far it has progressed and which treatments fit, whether drops, laser, MIGS, or traditional surgery.

Some East Texans still believe they will have to travel to Dallas or Houston for advanced eye surgery. Heaton Eye Associates has surgery centers in both Tyler and Longview, so patients can have MIGS and other advanced procedures close to home, cared for by a team that has served the region for more than 43 years.

Wondering whether minimally invasive glaucoma surgery could help protect your vision? Schedule an appointment at Heaton Eye Associates in Tyler, Longview, Athens, TX.