1. Objects are brought into focus on the retina by changes in the curve and thickness of the
A) rods and cones.
B) lens.
C) bipolar cells.
D) optic nerve.
2. For burn victims, a computer-generated virtual reality can help to control pain by means of
A) subliminal stimulation.
B) thought distraction.
C) phantom limb sensation.
D) blind sight.