In the established laws of physics and biomedicine, the arrangement of light entering the human eye is comparable to the current general lens theory, especially that part of the theory related to camera systems, and it is generally accepted that the mechanism of perception is controlled by the same laws. It is suggested that current thinking cannot explain the total visual process and the underlying mechanisms in terms of the general lens theory alone, especially the mechanism of perception, and that a radical rethinking will be necessary. To this end it is proposed that the visual process has a unique harmonic quality which enables it to operate as a collector for light arranged in a dual progressive series, a double helical spectrum. By geometrically relating to the double helix of the electromagnetic spectrum the eyes organize and control all aspects of vision.