What is identified as a major cause of cataracts related to environmental factors?

• A. Increased rainfall
• B. Increased UV light at ground level
• C. Decreased temperatures
• D. Increased air pollution

Answer: (B)

Increased UV light at ground level is identified as a major cause of cataracts related to environmental factors because exposure to ultraviolet radiation, particularly UV-B rays, has been shown to accelerate the formation of cataracts in the lens of the eye. UV light can damage the proteins in the lens, leading to clouding and the development of cataracts, which can impair vision.

While factors such as increased rainfall, decreased temperatures, and increased air pollution have various health impacts, they are not directly linked to the specific mechanism by which cataracts develop. Increased air pollution can contribute to other eye conditions but does not have the same clear and established relationship with cataracts as UV light exposure does. Therefore, the significant role that UV light plays in cataract formation underscores the importance of wearing protective eyewear to mitigate the risks associated with increased UV exposure.