Final answer:
UVB overexposure can damage the lens of the eye, leading to cataracts, which can be treated by lens replacement. Preventative measures include wearing plastic sunglasses for better UV protection.
Step-by-step explanation:
Overexposure to UVB can damage the lens of the eye, potentially leading to the formation of cataracts, which is a clouding that causes a loss of vision. While cataracts are related to aging and can occur in 60% of individuals between ages 65 and 74, exposure to UVB light can exacerbate their development. Fortunately, treatment involves replacing the damaged lens with a plastic lens, and prevention includes wearing protective eyewear such as plastic sunglasses which offer greater UV protection than those made of glass. Proper eye protection is crucial as all sunlight contains some level of UVB, even with normal ozone levels, and the depletion of the ozone layer increases the risks associated with UVB exposure.