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Lasers have revolutionized industries like healthcare, manufacturing, and research, but their power comes with risks. Without proper eye protection, even brief exposure to laser beams can cause permanent retinal damage or blindness. This is where laser safety goggles become non-negotiable. How They WorkLaser safety goggles use specialized optical filters to block specific wavelengths of light. […]

VLT (visibility light transmission):Visibility light transmission is actually the amount of visible light that is allowed to pass through an optical lens. This is also called as the visible light transmittance or VLT%.  The lower the VLT%, the darker the lenses will be and vice versa.

OD (Optical density) generally refers to the amount of light absorbed by the lenses thus preventing the harmful laser rays from hitting directly to your eyes. Optical Density is also the measure of the attenuation of the energy that passes through the filter. In other words, OD is also the logarithmic reciprocal of transmittance that is

Pro Tip: Label your goggles with their wavelength/OD to avoid mix-ups in shared workspaces!