With our current generation and their selfies, I noticed my left eyelid hangs lower than my right, Is it normal? (photo)

From the photo, it is apparent that you have right upper eyelid ptosis (droop). You are compensating for this by using your eye brow in attempt to raise your eyelid. This is a condition that sometimes can be covered by your insurance if a formal visual test can show it is affecting your vision. An evaluation by an oculoplastics surgeon would be helpful.Good luckAJ Amadi

You have ptosis of your left upper eyelid.  This occurs when a muscle in the upper eyelid becomes weekend and allows the lid to fall lower across the eyeball than it should.  Ptosis can be repaired with surgery.  I would consult with an oculoplastic surgeon or a surgeon experienced in ptosis repair.  

You have ptosis of the right eye.  This can be fixed by a few different options but mostly you tighten the mechanism that lifts you eyelid.  Looks like your right eyebrow is compensating for the ptosis by raising which is why your right eyebrow is higher than the left.

 From the one very limited photograph, it appears there is ptosis present on that one lazy eyelid. This is due to the the eyelid opening muscles that are weak. Seek out an oculoplastic surgeon for repair of this to make your eyelid more symmetrical.  A cosmetic upper eyelid surgery( blepharoplasty) will have no benefit.

Your eyelid is droopy.  This is referred to as "ptosis".  You are also unconsciously raising your brow on the same side to compensate for the droopy eyelid; in other words, the brow is being used as a "pulley".  The eyelid can be raised to match the other eyelid.  The procedure is referred to as "Ptosis Repair".  

Thanks for the great question! It's very common for people to have asymmetries when comparing to two sides of the face. Perfectly symmetrical faces don't look natural when we look at them. If there is a large asymmetry then these can be improved both with non-surgical as well as surgical methods. I hope this helps! ~Dr. Sieber