A 58 year-old woman comes to your office with a pre-surgery clearance form. She is going to have cataract surgery next month and her eye doctor wanted her to get a physical examination before the surgery. She reports no medical complaints. Her past medical history is significant for occasional acid reflux disorder. Her serum creatinine level was 1.2 mg/dL two weeks ago. She works as a teller in a local bank and exercises one hour a day in the local gym. Her temperature is 99 °F (37.2 °C), heart rate is 78 beats/min, blood pressure is 125/80 mm Hg, respirations are 19 breaths/min, and oxygen saturation is 98% on room air. Her physical examination is significant for cataracts in both eyes. Of the following, the next step in her management is
