Laser radiation can present hazards because the eye focuses light onto a very small area of the retina, potentially increasing energy density. Even relatively low-power beams can pose risks under certain conditions.

Different wavelengths interact with the eye in different ways. Visible and near-infrared wavelengths can reach the retina, while ultraviolet and far-infrared wavelengths are absorbed by the cornea and lens.

Reflections can also be hazardous. Shiny or reflective surfaces may redirect laser energy unexpectedly, which is why protective eyewear is often recommended even when beams are enclosed.

Proper training, engineering controls, and protective equipment all play a role in reducing risk. Understanding how laser radiation interacts with the eye helps users appreciate the importance of appropriate protection.