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Why is a normal eye unable to see objects clearly when they are held closer than about 25 cm? at maximum ciliary muscle contraction

Question
Why is a normal eye unable to see objects clearly when they are held closer than about 25 cm? at maximum ciliary muscle contraction
Because the eye lens cannot decrease its focal length below a certain minimum limit, even
Because the retina stops functioning below 25 cm
Because the cornea becomes opaque at close range
Because the pupil closes completely at close range
Answer
Because the eye lens cannot decrease its focal length below a certain minimum limit, even
Detailed Explanation
The chapter explains that the focal length of the eye lens cannot be decreased below a certain minimum limit, which is why extremely close objects cannot be brought into sharp focus, causing strain or blur.
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