The nurse is assessing a client on a telemetry unit when the client states, "My vision is blurry, and I have been seeing yellow/green halos everywhere I look." Which of the following would the nurse suspect?

A. Hyperglycemia typically does not cause blurry vision and yellow/green halos. B. Captopril (Capoten) is an ACE inhibitor and is not associated with visual disturbances like halos. C. Verapamil (Calan) is a calcium channel blocker and does not typically cause visual symptoms such as halos. D. Digoxin (Lanoxin) toxicity can lead to visual disturbances, including blurry vision and seeing yellow/green halos, which are classic signs of toxicity.