Question: If the distance from the lens system (cornea + lens) to the retina is 2.00 cm, show that the focal length of the lens system

If the distance from the lens system (cornea + lens) to the retina is 2.00 cm, show that the focal length of the lens system must vary between 1.85 cm and 2.00 cm to see objects from 25.0 cm to infinity.

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