Led bulbs Vs CFL and incandescent bulbs
Continuous exposure to flickering light is known to cause myopia in developing eyes (here's a clinical study in guinea pigs, albeit with the frequency 2 orders of magnitude lower than you'd expect in LED lights). It was also the primary reason for CRTs to have ever-increasing refresh rate, which is close to the flickering frequency of LED lights. Apparently, the damage is reduced as the frequency increases, at least I can certainly assert that I've spent more than 4 weeks in front of a CRT as a kid, and I didn't get myopia yet.

Note that flickering is only present in the cheapest devices which lack any smoothing or regulation circuit, so if your LED lights have noticeable flickering, just go for a better brand. Those will have LEDs driven either constantly, or at much higher frequency.