The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to
A. presbyopia
B. accommodation
C. near – sightedness
D. far – sightedness
Answer:B
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to
A. presbyopia B. accommodation C. near – sightedness D. far – sightedness