Lisa is helping her brother, who isn't home, fill out his driver's application. When Lisa comes across the question asking if her brother is near-sighted or far-sighted, she gets his glasses to figure it out. When Lisa puts the glasses on, she can focus much closer than normal. What is her brother's eyesight?
a. Near-sighted
b. Normal vision
c. Far-sighted
d. Cannot determine from this information