I have been told that I have amazing eyesight.  The term they have used is visual acuity.  Do you know what that is?
I just found out that visual acuity is just a fancy name for how clear your vision is.
I see.  Do you know any benefits of clear vision?
I don't, but I do know that visual impairment is the term for issues glasses can't correct
What kinds of issues would those be?  Is it something like cataracts? 
Blindness is included, which is almost total loss of vision
Is there any cure for blindness?  Are there any procedures that can be done for it?
If it is cortical blindness, it's often temporary, so it cures itself