Which UV radiation band is most commonly linked with eye damage and skin cancer?

• A. UVB: Middle Wave
• B. UVA: Long Wave
• C. UVC: Short Wave
• D. Visible Light

Answer: (A)

UVB radiation is most closely tied to eye damage and skin cancer because its photons have enough energy to cause direct DNA damage in skin cells, which can lead to mutations and cancer over time. This band also affects the surface of the eye, contributing to conditions like photokeratitis and increasing the risk of long-term lens changes with cumulative exposure. UVA is present as well, and it contributes to photoaging and some cancer risk, plus eye effects, but it is less efficient at causing the direct DNA damage that drives skin cancer compared to UVB. UVC is largely blocked by the atmosphere and doesn’t reach the surface under normal conditions, so it isn’t a common cause of these issues from sunlight. Visible light is not UV radiation, so it isn’t a primary driver of these outcomes. Therefore, the UV band most commonly linked with eye damage and skin cancer is UVB.