It is determined that a patient has a near point at 50 cm. If the eye is approximately 2.0 cm long
(a) How much power does the refracting system have when focused on an object at infinity? when focused at 50 cm?
(b) How much accommodation is required to see an object at a distance of 50 cm?
(c) What power must the eye have to see clearly an object at the standard near-point distance of 25 cm?
(d) How much power should be added to the patient's vision system by a correcting lens?
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