That's a very creative way of spicing up a boring old glass eye! I imagine such "wearable" tech could also be the ultimate version of those snapchat glasses. Putting a battery inside your eye socket seems incredibly risky to me, though. Especially one that can power a bright light like this for a while...
I wonder what power laserpointer you could fit in there without going overboard with the battery... Imagine being able to light matches by looking at them for a bit. On the other hand, every mirror would be a great chance to lose your other eye as well, so maybe disregard my ideas.
I have some laser pointers capable of lighting matches. They get hot.