It appears that the answer is dependent on the topic you are currently covering.
Consciousness would need to be maintained for one's sense of self.
HEY THERE JBATTLE WASSUP
THE ANSWER IS: <span>chronic hypohydration as you get older
HOPE IT HELPS!!!!:)
HAVE AN AWESOME SATURDAY! </span>
I actually have that problem. I have 20/40 vision and my left eye is pretty much blind. I was prescribed glasses so that my sight in my left eye would not get worse. All to say, I would consider glasses to be necessary in this case. It definitely helps in every day life.
I hope this helps and have a great day!! :)