Aesthesia (n.): the ability to feel or perceive (awake and feeling). To look at an artwork aesthetically is to perceive it with the senses—to be awake and to be aware of perceptions and feelings.
Anesthesia (n.): the inability to feel or perceive (asleep and non-feeling).
Aesthetic: when used as a noun means “that which appeals to the senses.” When used as an adjective, it describes anything that tends to enliven or invigorate or wake one up. Someone’s aesthetic (noun) has to do with his or her artistic judgment. Example: A designer with a rich aesthetic decorated the room in red velvet and gold furniture.