Which method is effective in blocking more than 99% of harmful UV rays?

Wearing safety goggles is particularly effective in blocking more than 99% of harmful UV rays because they are designed to provide a protective barrier specifically against UV radiation that can damage the eyes. Safety goggles typically cover the eyes completely and fit snugly around the contours of the face, preventing any light from entering around the edges. This is crucial since UV rays can lead to various eye issues, including cataracts and other forms of retinal damage.

While other methods like sunscreen, wearing sunglasses, or staying indoors are beneficial in protecting the skin and eyes from UV rays to some extent, they do not provide the same level of comprehensive coverage that safety goggles do. Sunglasses can block harmful rays as well, but they often do not seal the area around the eyes, which can leave the skin and the edges of the eyes exposed. Sunscreen, while essential for skin protection, does not prevent UV exposure to the eyes at all. Staying indoors is effective at preventing UV exposure, but it is not a practical long-term solution, as it limits outdoor activity altogether.