Final answer:
The initial power for this patient should be -4.00 D.
Step-by-step explanation:
The initial power for this patient should be -4.00 D. The patient's prescription is -4.00-1.00x180 and their correction is +2.00 D. The initial power is determined by the prescription for their myopia (-4.00 D) and does not take into account the astigmatism correction (-1.00x180) or the near vision correction (+2.00 D).