An electronic device is provided that includes a frame, a transparent member, a leg member, a display module, a camera, and a light emitter configured to emit infrared light toward a user's eye. The electronic device also includes a lens member configured to switch between a reflective mode reflecting infrared light and a transmissive mode allowing visible light to pass. The lens member is disposed such that infrared light reflected from the user's eye to the lens member in the reflective mode is incident on the camera. The electronic device further includes a processor that controls the camera to receive visible light, which passes through the lens member in the transmissive mode, in order to generate first image information, and to receive infrared light, reflected by the lens member in the reflective mode of the lens member, in order to generate second image information.