Selective Light Therapy

Selective Light Therapy

Primary therapy for effective, proven glaucoma treatment

Selective Light Therapy (SLT) plays a critically important and consistently safe role in both the provision of essential patient pathology information and the treatment of glaucoma.

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Selective Light Therapy

Selective Light Therapy (SLT), also known as Selective Laser Trabeculoplasty, plays a critically important role in the treatment of glaucoma. Around the world, thousands of physicians are deploying the procedure as a primary therapy tool that stimulates the eye's natural healing response to effectively manage their patients’ IOP without the burn and scar tissue associated with argon laser trabeculoplasty (ALT).

  • Lowers IOP as effectively as medication when used as a first-line therapy1
  • Restores the outflow pathway naturally
  • Dual role in diagnosing and treating glaucoma
  • Pairs seamlessly across a range of MIGS procedures

Reduce IOP — as effectively as medication

SLT is an advanced, non-thermal nanosecond laser treatment that can achieve reductions in IOP as effectively as medication, without the associated side effects or compliance problems.1 SLT is also ideally suited for glaucoma patients who are frustrated with the effectiveness of their medications; it can play a role in reducing their associated financial and lifestyle burdens.

Particularly effective with non-compliant patients, SLT works by applying selective photothermolysis of the pigmented trabecular meshwork cells. This intervention stimulates the release of proteins and cytokines and the recruitment of macrophages to improve the circulation of aqueous humor through the meshwork and the inner wall of the Schlemm’s canal without causing thermal or coagulative damage.

Equivalent Efficacy to Medication
Baseline IOP24.5 mm Hg24.7 mm Hg
Post-Treatment IOP18.2 mm Hg17.7 mm Hg

A key tool in diagnosis

You can evaluate the result of intervention with SLT to estimate the location of the pathology. If the intervention is successful, the primary region of obstruction may lie within the trabecular meshwork, but if it is ineffective, then the primary obstruction may reside elsewhere. That’s why SLT can play a key role in helping both to understand a patient’s pathology and provide key information on the potential efficacy of future treatments.

Seamless pairing with MIGS

SLT pairs seamlessly with all MIGS procedures, including ABiC™ (ab-interno Canaloplasty), as both a preoperative diagnostic aid or as a postoperative adjunct, and can be deployed synergistically to reduce the need for further medication or future filtration surgery.

Proven capability

Ellex’s proprietary SLT technology delivers advanced energy control, a sharp-edged aiming beam and the industry’s fastest firing rate of three shots per second*. It's a capability that's being used every day by thousands of physicians around the world to visualize the trabecular meshwork in greater detail, and to perform procedures faster and with improved accuracy, delivering better patient outcomes - reliably, accurately and safely.

*Based on system performance testing. Data on file. Ellex Medical.

1. Katz LJ, Steinmann WC, Kabir A, Molineaux J, Wizov SS, Marcellino G; SLT/Med Study Group.
Selective laser trabeculoplasty versus medical therapy as initial treatment of glaucoma; a prospective, randomized trial. J Glaucoma. 2012,21:460-8

“SLT has the potential to become the go-to glaucoma treatment. Not only can SLT eliminate or at least reduce the need for drops, it can help to preserve vision and delay or even prevent complicated, invasive surgical interventions.”

SLT resources


SLT: The First In-Line Advantages of SLT

This CRST article features an article by Paul I. Singh, MD, which discusses the first-line benefits of SLT in lowering IOP, reduce medication use, and provide key diagnostic information.

Associated websites

Proactive Glaucoma Care

Visit our online resource to learn more about how SLT and MIGS are helping to shift the paradigm towards proactive glaucoma care.

Associated websites

Physician SLT Blog

Read about how SLT can help in the management of modern-day glaucoma. Blog curated by Dr. Savak “Sev” Teymoorian, MD, MBA (USA).

Associated websites

SLT Patient Education

A restorative approach, learn how SLT can restore the eye’s natural drainage channel.


SLT Physician Education

Review more than 200 SLT references, including peer-review papers, articles, posters and book chapters.


The Evolution of SLT

This interview with Dr. Latina, the inventor of SLT, addresses the role of SLT in clinical practice, including its role as a primary therapy – and as an adjunct to MIGS.


ASCRS Glaucoma Roundtable: SLT Misconceptions

Iqbal Ike K. Ahmed, MD, FRCSC, asks this roundtable of surgeons to clarify the misconceptions surrounding selective laser trabeculoplasty (SLT).


Restoration of Outflow Pathways with iTrack

David Lubeck, MD discusses the role of ABiC in conjunction with SLT and MIGS.


SLT as a Primary Therapy for Glaucoma

Video Interview with Andrew G. Iwach, MD (USA) addresses the demonstrated efficacy of SLT as a primary therapy.


SLT Treatment Protocol

SLT works by stimulating a natural healing response in the body to manage the elevated IOP associated with glaucoma, promoting cellular regeneration without the burn and scar tissue associated with other laser procedures.


SLT for Narrow Angle Glaucoma

When performing SLT on patients with narrow angles, visibility is reduced compared to normal angles. Watch the video to learn more.

Contact us

Ellex is the manufacturer of the Tango Reflex and Tango for the reduction of intraocular pressure (IOP) in patients with open-angle glaucoma. Tango Reflex and Tango have been approved for the indication of Selective Laser Trabeculoplasty (Selective Light Therapy, SLT) whereby they may potentially improve patient IOP. Ellex does not accept any responsibility for use of the systems outside of this indication.

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