Well, yes, uv light is very bad for you, especially for your eyes,, for it can just have damage on your eyes and the skin. Generally speaking, the sun emits three types of rays, which are visible, infrared and ultraviolet (UV). And according to some researches, the invisible UV light is the component of sunlight most responsible for eye damage. If you explore in the sunlight for a long, it can do permanent sun damage. And in some cases, it will just cause some eye diseases, such as cataracts, blindness, and eye cancer. And that is why we wear sunglasses which can provide UV protection, when we go outside.