Dr. Callahan is a competent professional who answered all my questions with patience. Her caring staff provided reminders and follow-ups. I had cataract surgery on both eyes; now 20/20 vision!
John Mcallorum
MIGS and Traditional Glaucoma Surgery: What Patients Need to Know
What Is Traditional Glaucoma Surgery?
Traditional glaucoma surgeries create entirely new drainage pathways to allow fluid to leave your eye more effectively. These procedures offer more powerful pressure reduction than most MIGS approaches and are often recommended when glaucoma is advanced or when other treatments have not controlled pressure adequately.
The most common traditional glaucoma surgery is called trabeculectomy. Your eye doctor creates a small opening in the white part of your eye, allowing fluid to drain into a space beneath the surface tissue where it forms a filtering bleb. This bleb absorbs the fluid gradually, keeping eye pressure at a safer level.
A glaucoma drainage device, sometimes called a tube shunt, uses a small silicone tube connected to a plate placed on the outside of the eye. The tube diverts fluid from inside the eye to the plate, where it is absorbed by surrounding tissue. This approach is often used when trabeculectomy has failed or is not suitable.
Traditional surgeries involve larger incisions than most MIGS procedures and require a longer recovery, often several weeks to months. However, they are capable of achieving substantially lower eye pressures and are the appropriate choice for patients whose vision is at serious risk from uncontrolled glaucoma.
Where Laser Treatment Fits In
Before considering incisional surgery of any kind, our team evaluates whether laser treatment can help manage your eye pressure. Laser procedures are office-based, require minimal recovery, and can serve as an important bridge between medications and surgery for many patients.
Selective laser trabeculoplasty, known as SLT, is a gentle laser procedure that stimulates your eye's natural drainage tissue to improve fluid outflow. It is commonly used for open-angle glaucoma, the most prevalent form of the disease, and can reduce the need for daily eye drops or delay the need for surgery. SLT is performed in our office and involves minimal discomfort and recovery time.
For certain types of glaucoma where the drainage angle is narrow or closed, a procedure called YAG laser peripheral iridotomy (YAG PI) may be recommended. This laser creates a tiny opening in the iris to relieve pressure and prevent dangerous pressure spikes. It is also an in-office procedure with a quick recovery.
Laser procedures do not work equally well for every glaucoma type, and their effect can diminish over time. If your pressure remains too high after laser treatment, or if your optic nerve damage is progressing despite laser therapy, your eye doctor will discuss whether MIGS or traditional surgery is the appropriate next step. Your response to laser also helps inform surgical planning.
Who Is a Candidate for Each Surgical Approach
Choosing between MIGS and traditional surgery depends on a careful evaluation of your individual eye health, glaucoma severity, treatment history, and personal circumstances. Our eye doctors assess each of these factors together before making a recommendation.
MIGS is generally best suited for patients with mild to moderate open-angle glaucoma who need additional pressure reduction beyond what medications or laser can provide. It is a particularly strong option when combined with cataract surgery, since the cataract incision gives convenient access to the drainage structures at the same time.
- Most appropriate for open-angle glaucoma with accessible angle structures
- Patients who want a typically faster recovery and less disruption to daily life
- Those needing modest to moderate pressure reduction
- Patients already scheduled for cataract removal who also have glaucoma
Traditional surgery becomes the right recommendation when you need aggressive pressure reduction to preserve what vision remains. Patients with advanced glaucoma, very high eye pressures, or prior failed MIGS procedures often require the stronger, more reliable effect that trabeculectomy or tube shunt surgery can provide.
We also turn to traditional approaches when multiple medications and previous procedures have not brought your pressure into a safe range. In these situations, more powerful intervention is essential to protect the optic nerve from further damage.
No single factor determines the right surgical approach. Our team reviews the full picture before making a recommendation that is specific to you.
- Your current eye pressure and individualized target pressure range
- The extent of optic nerve damage already present
- Your glaucoma type and drainage angle structure
- Prior treatments and how well they worked
- Your overall health, healing ability, and lifestyle preferences
When you need both cataract removal and glaucoma treatment, performing them together can often eliminate the need for a second procedure and separate recovery period. Trabecular MIGS approaches, including goniotomy, are particularly well-suited to combined surgery because the cataract incision provides natural access to the drainage angle structures.
Traditional glaucoma surgery can sometimes be combined with cataract removal as well, though careful planning is required. In some cases, your eye doctor may recommend staging the two procedures separately so that each healing process can complete without affecting the other.
What Happens Before and During Surgery
Preparation for glaucoma surgery involves detailed testing, careful planning, and clear communication between you and our team. Understanding what to expect before and during the procedure helps reduce anxiety and supports a smooth recovery.
Before surgery, we measure your eye pressure multiple times and examine your optic nerve to establish a clear baseline. Specialized imaging of your drainage angle and optic nerve helps us plan the procedure in detail. You will also receive instructions about which medications to temporarily stop, how to arrange transportation on surgery day, and how much time to plan for recovery.
During MIGS, you lie comfortably while your eye doctor works through a microscope to access the tiny drainage structures inside your eye. Most patients feel only mild pressure during the procedure, and surgery typically takes less than 30 minutes from start to finish.
- A small incision is made in the clear front surface of your eye
- A micro-scale device improves drainage in the targeted area
- The incision often seals on its own without stitches
- You remain awake but comfortable throughout
- Temporary redness or small blood spots inside the eye can occur and usually resolve on their own
Traditional glaucoma surgery involves creating a new drainage pathway in the white part of your eye. Your eye doctor makes a small flap in the eye wall and removes a tiny piece of tissue to allow fluid to drain into a protected space beneath the surface, forming a filtering bleb. The procedure takes approximately 45 to 90 minutes depending on the technique used, and very fine stitches help control the rate of fluid drainage.
Most adult glaucoma procedures use local anesthesia combined with intravenous sedation, so you stay relaxed and comfortable without feeling pain. General anesthesia is reserved for specific situations, such as significant patient anxiety or particular medical needs. We discuss your comfort concerns during your pre-operative visit so we can choose the best option for you.
Recovery and Aftercare for MIGS
Recovery after MIGS is generally shorter and less disruptive than after traditional surgery, though individual timelines vary. Following your aftercare instructions carefully during this period is essential for protecting the results of your procedure.
Most patients notice improved comfort within the first few days after MIGS. Vision may be slightly blurry initially but typically clears within about a week as inflammation settles. Activity restrictions and your return to work are individualized based on your eye's condition and your eye doctor's specific guidance.
- Avoid swimming and hot tubs for two weeks
- Skip heavy lifting and straining for approximately one week
- Wear a protective eye shield at night for the first week
- Many patients return to desk work within a few days
- Resume normal exercise after approximately two weeks, with your doctor's approval
Protecting your eye from injury and infection is your top priority after MIGS surgery. Use your prescribed eye drops exactly as directed, keep water away from your eye when showering, and avoid rubbing or pressing on the eye at any time. Good hand hygiene before touching your face is equally important throughout your recovery.
You will see your eye doctor the day after surgery, then again at approximately one week, one month, three months, and six months. These visits allow us to check your eye pressure, examine the surgical site, and adjust your medications if needed. If you received a subconjunctival gel stent, we also monitor for any changes to the drainage bleb that might affect how well it functions.
Recovery and Aftercare for Traditional Surgery
Recovery from traditional glaucoma surgery takes longer than most MIGS procedures, with vision gradually improving over several weeks. Careful follow-through with aftercare instructions and scheduled visits is especially important during this extended healing period.
Your eye may feel irritated or scratchy during the first week after traditional surgery, and you might notice a small bump on the white part of your eye where the new drainage pathway formed. We ask patients to avoid any activity that raises eye pressure, such as heavy lifting or bending with your head below your waist, for at least four weeks. Recovery timelines and activity restrictions are individualized based on your specific findings and your eye doctor's guidance.
After traditional glaucoma surgery, protecting your eye from injury and infection is the most important thing you can do to support healing. Follow all instructions from your eye doctor precisely, and do not skip prescribed eye drops even if your eye feels comfortable.
- Use prescribed steroid and antibiotic drops exactly as directed
- Keep water away from your eye during showering
- Avoid rubbing or pressing on your eye
- Sleep with your head elevated on two pillows initially
- Practice careful hand hygiene before touching your face
You will see your eye doctor the day after surgery and again at one week, one month, three months, and six months. Additional visits are common after trabeculectomy or subconjunctival stents to perform adjustments such as suture release or bleb needling (a minor in-office procedure to improve drainage) if pressure is not low enough. We watch closely for any signs of scarring that could block the new drainage pathway over time.
Contact our office right away if you experience any of the following after glaucoma surgery. These symptoms can signal complications that need prompt care to protect your vision.
- Sudden or significant loss of vision
- Severe eye pain that is not relieved by your prescribed medications
- Increasing redness spreading across your eye
- Pus-like discharge from your eye
- New shadows, curtains, or floaters with flashing lights in your vision
- Severe headache with nausea or vomiting
Outcomes and Long-Term Results
What you can expect from glaucoma surgery depends on the procedure used, your baseline eye pressure, and how your eye heals over time. Our team discusses realistic expectations with you before surgery so you can plan accordingly.
MIGS procedures reduce eye pressure in many patients, with the degree of reduction varying by device type and individual eye characteristics. Traditional surgery often achieves lower target pressures overall, though the drainage pathway can gradually become less effective as natural scarring occurs during healing. Long-term success for both approaches depends on careful monitoring and follow-up care.
Many patients are able to reduce the number of glaucoma eye drops they use after MIGS, though complete elimination of drops is not always possible. The reduction depends on your target pressure and how well the specific device performs in your eye. Traditional surgery more often allows patients to stop all glaucoma medications initially, though some eventually need to restart drops as partial scarring occurs over time.
MIGS generally carries a lower risk of serious complications compared to traditional surgery, which is one reason it is preferred for patients with mild to moderate disease. The trade-off is that MIGS typically provides less dramatic pressure reduction. Both approaches carry specific risks that your eye doctor will explain in detail during your consultation.
- MIGS risks include hyphema (blood inside the eye), temporary pressure spikes, device movement or obstruction, and the possible need for additional procedures
- Traditional surgery risks include very low eye pressure (hypotony), fluid accumulation behind the eye, bleb leaks, infection of the bleb (blebitis), corneal changes, and the need for further procedures such as needling or reoperation
- Infection related to blebs can occur years after trabeculectomy, making long-term monitoring important even after surgery is considered successful
Some patients require a second procedure if their initial surgery does not lower pressure enough or if its effect diminishes over time. After MIGS, traditional surgery may be recommended if pressure remains unsafe. After traditional surgery, minor in-office adjustments such as laser or needle procedures can sometimes restore drainage without requiring a full repeat operation. In selected cases, additional laser treatments targeting the eye's pressure-producing tissue may also be considered to lower eye pressure further.
Frequently Asked Questions
Here are answers to common questions patients ask when considering glaucoma surgery, along with guidance to help you prepare for your consultation.
Complete elimination of drops is possible for some patients but is not guaranteed by MIGS alone. The likelihood depends on how close your pressure comes to your target after surgery, your glaucoma severity, and which MIGS device was used. A meaningful reduction in medication burden, such as going from three daily drops to one, is often achievable and can significantly improve your quality of life even if total freedom from drops is not reached.
The decision involves examining your optic nerve, measuring your pressure, and assessing how much of your field of vision has been affected. Patients with accessible drainage angle structures and mild to moderate glaucoma who need modest pressure reduction are generally good MIGS candidates. If your optic nerve damage is more advanced or your pressure is very high, your eye doctor may determine that traditional surgery is the safer choice to protect what vision you have left.
We typically operate on one eye at a time, waiting for it to heal before scheduling the second eye. This approach ensures you retain functional vision in one eye during recovery and allows your eye doctor to apply any lessons from the first surgery when planning the second. Most patients wait several weeks between procedures, with the exact interval based on how well the first eye is healing.
When standard surgical options do not achieve adequate pressure control, additional treatments may be considered. These can include a second or different type of MIGS device, laser procedures that target the tissue responsible for producing fluid inside the eye, or combinations of these approaches. Your care plan is always adjusted based on your individual response and vision safety goals, and more complex cases may be co-managed with or referred to a glaucoma specialist.
Most major insurance plans, including Medicare, cover both MIGS and traditional glaucoma surgery when the procedure is medically necessary to preserve vision. Coverage requirements vary by device and plan, and documentation of prior treatments is typically required to support medical necessity. Our team verifies your benefits before surgery and helps you understand any potential out-of-pocket costs so there are no surprises.
The day-after visit is one of the most important check-ins in your entire recovery. Your eye doctor measures your pressure, looks at the surgical site for early signs of proper healing or complications, and may adjust your drop regimen. For traditional surgery patients, this visit can also reveal whether any immediate intervention is needed to optimize drainage. Attending this appointment is essential, even if your eye feels comfortable, because some complications develop without obvious symptoms early on.
Take the Next Step in Protecting Your Vision
The right glaucoma surgery for you depends on your unique eye health, the severity of your condition, and your personal goals. At NewView Eye Center, our team is dedicated to providing personalized, expert care that gives your vision the best possible protection. We invite you to schedule a consultation so we can review your test results, answer your questions, and help you move forward with confidence.
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