Selective Laser Trabeculoplasty (SLT)
When the eye’s drainage system becomes less efficient, pressure builds up, and that’s where treatments like SLT can help restore balance.
What Is Selective Laser Trabeculoplasty (SLT)?
SLT is a safe and effective laser treatment designed to lower eye pressure by improving how fluid drains from the eye. Unlike older laser methods, SLT uses short, low-energy laser pulses that selectively target pigmented cells in the trabecular meshwork — the area responsible for draining fluid.
The “selective” part of SLT means that only specific cells absorb the laser energy, leaving surrounding tissue unharmed. This precise, gentle approach makes SLT repeatable and ideal for patients who:
- Need additional pressure control despite using glaucoma medications
- Prefer to reduce or avoid daily eye drops
- Cannot tolerate side effects of glaucoma medications
- Have primary open-angle glaucoma or ocular hypertension
How the SLT Procedure Works
SLT is performed in-office and usually takes 5 to 10 minutes per eye:
- Numbing eye drops are applied for comfort.
- A special contact lens is placed to help focus the laser.
- The laser delivers brief pulses of light to the trabecular meshwork.
- The lens is removed, and the patient rests briefly before returning home.
Because SLT is non-invasive and doesn’t involve cutting or burning, there’s no tissue damage and no stitches or incisions. Most patients resume normal activities the same day.
What to Expect After SLT
After treatment, your doctor may prescribe a short course of anti-inflammatory eye drops to reduce irritation and support healing. Some patients experience mild blurriness, light sensitivity, or redness for a few hours — these temporary side effects usually resolve quickly.
Follow-up visits allow your doctor to monitor eye pressure (IOP) and ensure optimal results. SLT can reduce IOP by 20–30% on average, and its effect may last 3–5 years or longer. If pressure begins to rise again, the laser can often be repeated safely.
SLT vs. Glaucoma Medications
Who Is a Candidate for SLT?
You may be a good candidate for SLT if you:
- Have open-angle glaucoma or ocular hypertension
- Are not achieving target pressure with medications
- Experience side effects from glaucoma drops (such as redness or burning)
- Find it difficult to adhere to a daily drop schedule
- Want to reduce dependence on medications before considering surgery
Your Barnet Dulaney Perkins eye doctor will perform a detailed eye exam, measure your IOP, and discuss whether SLT fits into your treatment plan.
What to Expect During Treatment
Consultation
Pre-Treatment Preparation
The Laser Procedure
Post-Treatment Care
Follow-Up and Results
Safety and Side Effects of SLT
SLT is widely recognized as a safe, well-tolerated glaucoma treatment. Common, short-term side effects may include:
- Mild eye redness or irritation
- Slight blurriness for a few hours
- Temporary light sensitivity
- Rare, short-term IOP spike (monitored and managed by your doctor)
These effects typically resolve within a day or two, and long-term complications are extremely rare.
Life After SLT
Most patients resume work and daily activities immediately. You can wear contact lenses again after the first follow-up visit and drive as soon as your vision clears.
Regular eye exams remain essential to ensure your pressure stays controlled and to decide if retreatment or additional therapy is needed.
SLT can delay or even prevent the need for surgical glaucoma interventions, protecting vision for years.
Why Choose Barnet Dulaney Perkins Eye Center for SLT?
- Experienced glaucoma specialists using advanced selective laser systems
- Comprehensive care from diagnosis through long-term management
- Convenient Arizona locations in Phoenix, Tucson, Scottsdale, and Flagstaff
- Personalized treatment plans that integrate medications, SLT, or MIGS
- Patient-focused care centered on safety, education, and lasting outcomes
Your vision deserves trusted, evidence-based care. At Barnet Dulaney Perkins Eye Center, we take a proactive approach to preserve sight and enhance your quality of life.
Frequently Asked Questions About SLT
Is SLT painful?
No. SLT is a painless procedure. Numbing drops are used beforehand, and most patients only feel a gentle clicking sensation or see flashes of light.
How long does SLT take?
The treatment typically lasts 5–10 minutes per eye, followed by a brief recovery period in the office.
When will I see results?
Pressure reduction often begins within a few weeks, with full results seen around the 6–8 week mark.
How long do the results last?
Most patients enjoy lower eye pressure for three to five years or longer. The laser can be safely repeated if pressure begins to rise again.
Can I stop using glaucoma drops after SLT?
Some patients are able to reduce or discontinue medications, but your doctor will decide based on your IOP goals and overall glaucoma status.