Blue light can exert negative effects on your eyes. It can impair your vision and disrupt your sleep cycle. This is due to the fact that blue light penetrates all the way to your retina without being blocked by the cornea(the front, protective region of your eye that resembles a window). Blue light that enters your retina damages retinal cells, which subsequently results in macular degeneration. Long-term exposure to UVA light can potentially harm the retina, leading to cataracts.
However, this does not imply that using LED lights will guarantee your blindness. It does imply that you should take requisite measures, such as wearing safety goggles to protect your vision.