Medical and surgical lasers operating in the infrared spectrum—including Holmium (2100 nm), Thulium (1927–1940 nm), and CO₂ (10 600 nm)—require laser safety eyewear specifically engineered to filter invisible radiation that poses serious thermal hazards to the cornea and retina.
The LG-090 laser safety glasses are designed to meet this need, providing OD 5+ protection at 2100 nm and OD 6+ at 10 600 nm, with additional OD 4+ coverage at 1927 nm and 1940 nm. These values represent attenuation factors of 100 000× to 1 000 000×, depending on wavelength, offering robust defence for professionals in urology, ENT, and laser surgery environments.
Infrared Laser Hazards and Optical Density
Infrared lasers used in medical applications emit energy beyond the visible spectrum, where the eye lacks natural blink reflex protection. Holmium and Thulium lasers primarily affect the corneal and lens tissues, while CO₂ lasers can cause surface burns and thermal damage to ocular structures.
Optical Density (OD) defines the reduction ratio of transmitted laser power. For example, OD 6+ at 10 600 nm means only one-millionth of incident energy passes through the lens. The LG-090’s EN207 ratings (DI LB4 to DIRM LB4) demonstrate certified protection against continuous-wave, pulsed, and Q-switched laser sources under European testing protocols.
Comfort and Visibility
Despite its high attenuation, the LG-090 provides a neutral-tint filter with 41 % Visible Light Transmission (VLT), allowing surgeons and technicians to maintain natural colour perception and depth of field. The fit-over design accommodates prescription eyewear, and the lightweight polymer frame ensures comfort during extended operating procedures.
Standards and Compliance
The LG-090 meets or exceeds:
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AS/NZS 2211.1:2004 – Australia / New Zealand laser safety
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ANSI Z136 (US) – American National Standards for Safe Use of Lasers
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EN207 / EN208 (EU) – European performance and testing standards
Applications
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Holmium laser lithotripsy and urological surgery
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Thulium laser tissue ablation and ENT procedures
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CO₂ laser skin resurfacing and surgical cutting
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General operating theatre laser protection for staff and observers