The relaxed eyes of a patient have a refractive power of 48.5 diopters.
(a) Is this patient nearsighted or farsighted? Explain.
(b) If this patient is nearsighted, find the far point. If this person is farsighted, find the near point. (For the purposes of this problem, treat the eye as a single-lens system, with the retina 2.40 cm from the lens.)