Apparatus and method for visual training as a function of retinal reflection

A voluntary control, intended to obtain an increase in retinal reflection, is carried out using an auditory biofeedback technique based on the measurement of retinal reflection, for the purpose of achieving an improvement in visual perception in its principal functions; the method includes the following phases: periodic measurement of the retinal reflection and of its variations, independently of factors concerning ocular optics; production of a tone representative of such measurements, which informs the patient as to the condition and as to the variations of his own retinal reflection; instruction on voluntarily increasing the retinal reflection by means of the voluntary control of the biofeedback tone.