Your patient reads 20/20 with the following setting: -2.00 + 1.25 x 065. To refine the sphere, you first change the sphere setting to -1.75. The patient says the 20/20 line is now a bit blurred. You show her -2.00 again, and she says it is clearer. Now, you change the sphere to -2.25. The patient says the letters are smaller but clearer. She cannot read 20/15 at any setting. What is your next step?