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.