Playing with prescription glasses sometimes can pose a problem. If you use the sanction eyeglass cover, it is bulky and sometimes problematic.
The Best Solution is to buy prescription sports glasses/goggles.
You can get prescription sports glasses that are specifically design and are sanction for racquetball/squash. Please make sure that you order ASTM F-803 certified eye wear. The glasses/goggles are specifically made to protect your eyes from the impact of the ball and racquet. Click here to see the selection.