Which type of UV radiation is considered most harmful to the eyes?

UVB radiation is considered particularly harmful to the eyes. This type of UV radiation has a shorter wavelength compared to UVA and is primarily responsible for causing damage to the outer layers of the skin as well as contributing to cataracts and other eye-related issues.

While UVA rays can penetrate more deeply into the skin and are associated with skin aging and some skin cancers, they are less likely to cause the immediate damage to the eyes that UVB rays can inflict. UVC rays, though highly dangerous in theory, are mostly absorbed by the Earth's atmosphere and do not typically reach the surface, making them less of a concern in everyday situations regarding eye safety.

Understanding the roles of these different types of UV radiation helps in recognizing the importance of protective eyewear to shield against potential eye damage caused by UV exposure. Therefore, the reason why UVB is noted as the most harmful to the eyes is its association with serious ocular conditions, including photokeratitis and long-term effects leading to cataract formation.