Her bedside manner is warm and reassuring, and she takes the time to explain everything clearly. I cannot recommend her highly enough, she’s truly top-notch.
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Selective Laser Trabeculoplasty (SLT) for Glaucoma
Who Is a Good Candidate for SLT?
SLT works best for specific types of glaucoma and certain patient situations. Our eye doctors evaluate each patient carefully to determine whether SLT is the right fit, or whether another approach would serve you better.
Open-angle glaucoma is the most common form and the primary condition SLT is designed to treat. In this type, the eye's drainage canals gradually become less efficient over time, causing pressure to build. SLT directly targets this drainage system to restore more normal outflow.
Ocular hypertension means eye pressure is elevated, but no optic nerve damage has occurred yet. In these cases, SLT can serve as a preventive measure, helping to delay or prevent the onset of full glaucoma.
Glaucoma eye drops must be used consistently, every day, to be effective. For patients who experience side effects, have difficulty with the routine, or face challenges affording ongoing medication, SLT offers a practical alternative that can reduce or sometimes eliminate the need for daily drops.
SLT is not appropriate for every patient or every type of glaucoma. It is generally not used for angle-closure glaucoma, eyes with significant scarring in the drainage angle, or eyes with active inflammation. Our eye doctors will review your full history and measurements to determine the safest, most effective treatment plan for your individual situation.
The SLT Procedure: What to Expect
SLT is a quick, in-office procedure that most patients find very comfortable. Knowing what happens before, during, and after your treatment can help you feel confident and prepared.
Before the procedure begins, our team will walk you through what to expect and answer any questions you have. Anesthetic (numbing) eye drops are applied so you will not feel discomfort. You may also receive a drop beforehand to help prevent a temporary pressure spike that can occasionally occur after the laser is applied.
You will be seated at a laser instrument that looks similar to the slit lamp used during routine eye exams. A small contact lens is gently placed on your eye to help focus the laser precisely on the trabecular meshwork. The laser delivers a series of brief, quiet pulses of light. Most patients notice a flashing light and mild warmth. The entire laser treatment typically takes about five to ten minutes per eye.
After the procedure, your eye pressure is checked about an hour later to make sure it has responded safely. Your vision may be slightly blurry for a few hours, and your eye may feel mildly irritated or sensitive to light. You will need a driver to take you home.
- Use any prescribed anti-inflammatory eye drops as directed for a few days
- Avoid rubbing the treated eye
- Continue any existing glaucoma eye drops unless your eye doctor advises otherwise
- Attend your follow-up appointment, typically scheduled within one to six weeks
It generally takes one to three months for the full pressure-lowering benefit of SLT to develop. Your eye doctor will track your progress with follow-up pressure checks during this time.
Most patients experience a reduction in eye pressure of approximately 20 to 30 percent. The pressure-lowering effect typically lasts between one and five years. Because SLT does not create scar tissue, the procedure can be repeated when needed to maintain pressure control over time.
Safety, Risks, and Side Effects
SLT has an excellent safety record and is one of the gentler laser procedures used in ophthalmology. Most side effects are mild and resolve on their own within a few days.
After SLT, it is normal to experience some redness, mild light sensitivity, or a slight scratchy feeling in the treated eye. These effects typically resolve within a day or two and do not require special treatment beyond the prescribed drops.
In rare cases, a more significant or prolonged rise in eye pressure, or extended inflammation, can occur following SLT. These situations are uncommon and are generally manageable with medication. This is one reason we monitor your pressure in the hour immediately following the procedure and schedule follow-up visits soon after.
Careful patient selection is the most important step in keeping SLT safe. Our eye doctors take a thorough look at your eye anatomy, glaucoma type, and overall eye health before recommending any laser treatment. Detailed pre- and post-treatment instructions, along with consistent follow-up, are essential parts of the process.
Frequently Asked Questions
These answers address questions that come up often and are intended to help you make informed decisions about your glaucoma care.
That depends on how well your pressure responds and what your target pressure needs to be. Some patients are able to stop drops entirely after SLT, while others may reduce the number of drops they use. A smaller group may need to continue drops alongside SLT to reach the pressure level their eye doctor has determined is safe for their optic nerve. Your follow-up appointments will guide that decision over time.
No. Glaucoma is a chronic condition, and SLT is a management tool, not a cure. It helps control eye pressure to slow or stop the progression of optic nerve damage, but it does not restore vision that has already been lost or eliminate the need for ongoing monitoring. Glaucoma requires lifelong care and regular check-ups regardless of how well treatment is working.
SLT is considered a medically necessary procedure for glaucoma treatment and is typically covered by Medicare and most private insurance plans. Coverage specifics can vary, so our team can help verify your benefits before your appointment so there are no surprises.
If SLT does not lower your pressure adequately, or if your pressure rises again over time, there are other options available. SLT can sometimes be repeated. In other situations, your eye doctor may recommend a different laser approach, adjustments to your medication, or a referral for surgical evaluation. We work to find the right combination of treatments for each individual patient.
These are all different laser or surgical approaches to lowering eye pressure, but they work in different ways and are used for different types of glaucoma. SLT improves drainage through the trabecular meshwork and is primarily used for open-angle glaucoma. YAG Peripheral Iridotomy creates a small opening in the iris and is used for angle-closure glaucoma or eyes at risk for it. MIGS procedures, including goniotomy, involve tiny surgical approaches to improve drainage and are often performed at the time of cataract surgery. Your eye doctor will recommend the approach best suited to your specific diagnosis.
Glaucoma progression is usually detected through regular eye pressure measurements, optic nerve imaging, and visual field testing (a test that maps your peripheral vision), not through symptoms you would notice at home. This is why consistent follow-up care is so critical. If your pressure is not adequately controlled or your nerve shows signs of change, your treatment plan will be adjusted accordingly.
Take the Next Step in Protecting Your Vision
NewView Eye Center is proud to offer SLT and a full range of glaucoma management options to patients across Northern Virginia. Our experienced eye doctors are committed to building a personalized care plan that protects your vision for the long term, and we are here to guide you through every step of the process. We welcome you to schedule a consultation so we can evaluate your eye health and discuss the options that make the most sense for you.
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