RETINA & GLAUCOMA
LIGHTLas 577
Yellow Photocoagulation Laser. Superior Hemoglobin Absorption with SP-Mode® Microsecond Laser Technology
LIGHTLas 577
Yellow Photocoagulation Laser
The LIGHTLas 577 delivers true solid-state 2.0W of 577nm yellow laser energy with dual operational modes. This laser is a compact, reliable console with multiple delivery options that handles your entire retinal and glaucoma laser workflow from one device.
- Gentler macular treatment for patients: 577nm yellow wavelength with reduced xanthophyll absorption minimizes photoreceptor damage near the fovea.
- Superior hemoglobin absorption: yellow wavelength targets microaneurysms and neovascularization with less energy than green.
- True solid-state 2.0W at 577nm: utilizing OPSL technology delivers stable yellow wavelength precision with superior energy efficiency and prolonged laser longevity.
- Dual-Mode Treatment Versatility: Combines SP-Mode® Microsecond Laser Technology for tissue-sparing, sub-threshold therapy with demonstrated reduction in central macular thickness, alongside Continuous Wave (CW) mode for traditional photocoagulation including PRP, focal, and grid treatments, delivering comprehensive retinal care in one platform.
- Multiple delivery options: Connect to LaserLink integrated slit lamp, Haag-Streit adapter, laser indirect ophthalmoscope, or 20G/23G/25G endophotocoagulation probes. One console supports office-based and intraoperative workflows across all delivery modalities.
577nm Yellow Wavelength
Yellow laser offers peak hemoglobin absorption near the oxyhemoglobin absorption maximum. This wavelength characteristic enables precise targeting of microaneurysms, retinal neovascularization, and vascular leakage with less energy compared to green wavelengths.
Reduced Xanthophyll Absorption
Yellow wavelength absorption by macular xanthophyll pigments is lower than green 532nm. This characteristic allows safer treatment near the fovea, reducing the risk of photoreceptor damage during macular photocoagulation.
SP-Mode® Microsecond Laser Technology
Built-in sub-threshold microsecond pulsing enables tissue-sparing laser therapy. SP-Mode® with 577nm combines the benefits of yellow wavelength with micropulse delivery, offering exceptional precision for central serous chorioretinopathy and diabetic macular edema treatments.
Continuous Wave (CW) Mode
Traditional Continuous Wave (CW) photocoagulation mode for panretinal photocoagulation, focal macular treatment, and grid patterns. Adjustable power (10–2000 mW) and duration (10–5000 ms) support the full range of retinal laser applications.
Multiple Delivery Options
Connect to LaserLink integrated slit lamp, Haag-Streit adapter, laser indirect ophthalmoscope, or 20G/23G/25G endophotocoagulation probes. One console supports office-based and intraoperative workflows across all delivery modalities.
7-Inch Touchscreen Interface
Intuitive LCD touchscreen simplifies parameter adjustment and mode switching. The large display provides at-a-glance confirmation of settings while integrated treatment logs support clinical outcomes tracking and quality assurance documentation.
See the touchscreen interface →
Combo System Availability
Available as a standalone 577nm console or in combination with the LIGHTLas SLT Deux-V or LIGHTLas YAG-V. Combo configurations let you add glaucoma SLT or YAG capsulotomy capability without a second laser platform.
See the SLT Deux-V/577 combo system →
Responsive Service & Support
Backed by LIGHTMED’s dedicated service team with local service centers. Practice-friendly warranty and service plans help minimize downtime and keep your clinic running smoothly.
What Sets LIGHTMED's 577nm Apart
Built on a diode-pumped Nd:YVO₄ + KTP solid-state architecture, LIGHTMED's 577nm yellow laser is engineered for stable continuous output, high beam quality, and long system life. A vanadate laser crystal combined with KTP frequency conversion generates a precise 577nm wavelength, and advanced crystal coating technology extends durability well beyond conventional platforms.
Strongly absorbed by hemoglobin for efficient vascular targeting, the 577nm wavelength's minimal xanthophyll absorption allows physicians to treat closer to the fovea with greater safety. Reduced light scattering in ocular media also improves precision in patients with mild cataracts or vitreous haze.
Clinical Applications
- Diabetic macular edema (DME) and central serous chorioretinopathy (CSC)
- Retinal vein occlusion (RVO) and microaneurysm treatment
- Subthreshold and tissue-sparing microsecond laser therapy
- Focal and grid photocoagulation near delicate macular structures
Accessories
- Endoprobes (straight, flexible, illuminated) 20G, 23G, 25G, 27G
- TruSpot Slit Lamp Adaptor (SLA) for Haag-Streit (analogues)
- TruSpot Slit Lamp Adaptor (SLA) for LIGHTLas YAG-V, LIGHTLas SLT, and LIGHTLas SLT Deux-V
- LaserLink Integrated Slit Lamp (SL980)
- Keeler Vantage Laser Indirect Ophthalmoscope (LIO)
- Power control foot pedal
- Motorized and fixed safety filter for microscopes
- Mobile SMART Cart
LIGHTLas 577 Technical Specifications
| Laser System | Optically Pumped Semiconductor Laser (OPSL) true CW and SP-Mode® |
| Laser Safety Classification | Class 4 |
| Wavelength | 577 nm yellow |
| Power Output | 0.05 – 2.0 W, continuously variable |
| Max Power at Cornea | 2.0 W (Endo, LIO, and SLA at all spot sizes) |
| Pulse Duration | 0.01 – 3.0 s, continuously variable |
| Pulse Interval | Variable from 0.01 – 3.0 s, and continuous |
| SP-Mode® Settings (Sub-Threshold Laser Therapy) |
Duration: 150 µs – 600 µs (in 50 µs increments) Duty cycle: 5% – 30% (in 2.5% increments) Period: 1400 µs – 1850 µs (in 50 µs increments) |
| Cooling | Auto Fan & TEC’s for Laser & Crystal |
| Treatment Spot Size | 50 – 1000 µm Integrated Version |
| Aiming Beam | Laser diode 635–650 nm red, 0.1 – <1 mW, max. power 1.0 mW |
| Slit Lamp Illumination | LED XLamp® XM-L2 2.85 V 10 W |
| Aiming Laser Safety Classification | Class 2 |
| Dimensions (Laser Console) | 13 cm (H) × 36 cm (W) × 33 cm (D) | 5.1 in (H) × 14.5 in (W) × 12.9 in (D) |
| Weight (Laser Console) | 8.8 kg | 19.4 lbs |
| Power Requirements | 100–230 VAC, 50–60 Hz Auto Ranging |
Laser Indirect Ophthalmoscope
| Indirect Model | Keeler Vantage |
| Retinal Spot Size | 1100 µm, measured at 280 mm from the front face of the LIO |
| Illumination Power | From laser console or stand alone power source |
| Fiber Length | 5 m |
| Weight | 800 g |
| Safety Filter | Fixed filter > OD 5.5 @ 577 nm |
Specifications subject to change. Refer to the operator manual for complete technical details.
Supporting Research for 577nm Yellow Laser
Yellow 577nm wavelength offers unique advantages for macular photocoagulation. Below are studies from the LIGHTMED clinical library demonstrating clinical benefits.
Short-Term Outcome (1 year) of Yellow Subthreshold Pulsed Laser Treatment on Diabetic Macular Edema
Poster presentation evaluating the functional and anatomical effects of yellow (577nm) subthreshold pulsed laser therapy on diabetic macular edema at one-year follow-up, showing significant decrease in central retinal thickness.
Kikushima W, Tateno Y, Furuhata Y, Shijo T, Japanese Society for Ocular Circulation, 2019
Read Paper →Sub-Threshold Micropulse Yellow 577 Laser Treatment of Retinal Diseases
Clinical case series documenting applications of 577nm subthreshold micropulse laser (SP-Mode®) for treating various retinal pathologies including diabetic macular edema and central serous chorioretinopathy.
Remesnikov I, Astana Vision, 2017
Read Paper →Micropulse Laser Therapy vs Selective Laser Trabeculoplasty: A Comparison Study
Comparative study evaluating micropulse laser therapy versus selective laser trabeculoplasty using the TruScan Pro platform with 577nm yellow wavelength.
Madani R, Ayoub A, Alasil T, Retina Today, 2024
Read Paper →Choosing the Right Wavelength: Effectiveness of Yellow
Comprehensive review of yellow 577nm SP-Mode® subthreshold micropulse laser therapy, examining wavelength-specific advantages for retinal photocoagulation including selective absorption by melanin and oxyhemoglobin with reduced xanthophyll uptake.
Alasil T, Retina Today, 2020
Read Paper →Retrospective chart review of 43 eyes comparing red (670nm) and yellow (577nm) subthreshold micropulse laser for DME. Both wavelengths maintained visual acuity and significantly reduced central retinal thickness at 12 months, suggesting comparable long-term efficacy.
Kikushima W, Shijo T, Furuhata Y, et al., Pharmaceuticals, 2021
Read Paper →TESTIMONIALS
What Physicians Are Saying
“I have been utilizing the Yellow 577nm wavelength to treat my patients with macular edema. The yellow wavelength has proven to be both safe and effective with excellent patient outcomes.”
Tarek Alasil, MD
Long Beach, California
“Our clinics have used LIGHTMED lasers for a couple years now and we are very pleased. They perform at least as well; if not better than, what we used before and the service is outstanding. We were pleasantly surprised to find that the lasers are a better value financially and the warranty with service costs are more practice friendly as well. I like the ergonomics. The laser is easy to use and intuitive.”
Brian A. Francis, MD
Doheny Eye Institute, Los Angeles, California