Electronic device

Abstract

An electronic device capable of measuring the blood flow speed in a retina blood vessel or the like of an eye is provided. The electronic device includes a display portion, a sending portion, a receiving portion, and a control circuit. The sending portion has a function of generating a first ultrasonic wave with a first frequency and a function of sending a first electric signal corresponding to the first frequency to the control circuit. The receiving portion has a function of receiving a second ultrasonic wave, which is the first ultrasonic wave reflected by an object, with a second frequency, a function of generating a second electric signal corresponding to the second frequency, and a function of sending the second electric signal to the control circuit. Note that the object is one or more selected from a retina blood vessel and a blood vessel included in a retina of a user's eye. The control circuit has a function of calculating the blood flow speed in one or more selected from the retina blood vessel and the blood vessel with the use of the first electric signal and the second electric signal and a function of sending a third electric signal corresponding to the blood flow speed to the display portion. The display portion has a function of receiving the third electric signal and displaying the blood flow speed.

Dependencies are inferred from the claim text.