Which of the following is the environmental factor that causes cataracts in the workplace?

The environmental factor that causes cataracts in the workplace is ultraviolet rays. Ultraviolet (UV) radiation is a known risk factor for the development of cataracts as it can penetrate the eye and cause changes to the lens. Prolonged exposure to UV radiation, particularly in environments where individuals are exposed to sunlight or UV-emitting sources, increases the likelihood of cataract formation.

In contrast, while infrared rays, radio waves, and visible light are different types of electromagnetic radiation, they do not have the same direct impact on the eyes as UV rays do. Infrared rays are primarily associated with heat and can contribute to thermal injury but are not directly linked to cataract formation. Radio waves have longer wavelengths and are generally considered safe for the eyes. Visible light is essential for sight, but it does not cause the same damaging effects on the lens of the eye as ultraviolet rays can.