From what I know, putting a couple of lights on the inside of lenses doesn't make it that hard to see except in the dark, as long as the light isn't being shone into your eyes (and even then, it doesn't cause much trouble if the area's well lit). Plus you don't really need a very bright light to just make something glow.
As a rule of thumb; your vision is only obscured if the side of the lens facing your eye has more light shining on it than the side that isn't.
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Can't write, can't draw. Can code, a little.