What is considered the primary organ of concern to laser systems?

• A. Lung
• B. Eye
• C. Skin
• D. Heart

Answer: (B)

Protecting vision is the priority in laser safety. The eye is uniquely vulnerable because its lens and cornea can focus and concentrate laser energy onto a tiny spot on the retina, greatly increasing the energy delivered to retinal tissue. This can cause irreversible retinal damage in a very short time, even from relatively low-power or brief exposures. The retina also lacks pain receptors that would warn you of impending injury, so damage can occur without immediate awareness. Because vision loss has such a profound and lasting impact, preventing ocular exposure takes precedence, and protective eyewear matched to the laser’s wavelength, along with proper engineering controls, is essential. While skin injuries can occur with certain high-power beams, they do not represent the same level of lifelong impairment as potential blindness from eye exposure, making the eye the primary organ of concern.