Rx: -3.00 -0.50 x 90 Vertex distance= 11 mm
What is the power of a rigid contact lens fit 0.50 D steeper than the flattest corneal corneal meridian? Assume all the astigmatism is in the cornea.
A) -3.25 D
B) -3.50 D
C) -3.75 D
D) none of the above