AN UNBIASED VIEW OF TOON ME A RIDDLE

Q: I weaken all men for several hours every day. I teach you strange visions while you're away. I get you by evening, by day consider you again. None experience to get me, but do from my deficiency. What am I?In some cases retaining your pupils engaged for the duration of a (very long) school working day seems like a shedding battle. How will you g