What environmental hazards cause conjunctivitis?

* Air pollution: Chemicals and particles in the air, such as smoke, dust, and pollen, can irritate the eyes and cause conjunctivitis.

* Water contamination: Bacteria and other microorganisms in contaminated water can cause conjunctivitis if the water gets into the eyes.

* Soil contamination: Bacteria and other microorganisms in contaminated soil can cause conjunctivitis if the soil gets into the eyes.

* Radiation: Exposure to ultraviolet (UV) radiation from the sun or from artificial sources, such as tanning beds, can cause conjunctivitis.

* Trauma: Physical trauma to the eyes, such as a scratch or a blow to the eye, can also cause conjunctivitis.