Abstract: A system includes a biosensor having at least one electrode to receive signals from a patient, an amplifier to receive the signals from the at least one electrode, an analog-to-digital converter to receive the signals from the amplifier and convert the signals to digital data, a microprocessor, and an antenna to transmit the digital data, and a mobile computing device to: illuminate at least one photostimulator of the mobile computing device to provide luminous stimulation to the patient and perform measurements associated with ocular/retinal functions of the patient, receive the digital data from the biosensor in response to the luminous stimulation, display a waveform associated with the measurements on a graphical user interface (GUI), perform a comparison between the measurements and a library of diagnostic images, and determine an evaluation of a retinal function of the patient based on the comparison.