Solve the given question:
Question: A patient has a far point of 29.5 cm and a near point of 23.9 cm.
Part A: What power (in diopters) should be prescribed to correct the patient's vision using:
(a) contact lenses? _________________ D
(b) glasses which are worn 0.8 cm away from the patient's eyes? _______________D
Explanation and formulas needed for best answer!