Visual field loss may occur if damage occurs to any part of the visual pathway. The visual pathway that information travels along includes the eye, optic nerve, optic chiasm, optic tract, and the occipital lobe, which is the main part of the brain that deals with vision. Damage to the visual pathway may cause blurring or even complete loss of bits of the visual world (visual field).
Hemianopsia or "half vision" results from damage to one side of the optic tract. Images from only one half of each eye reach the brain, thus there is only reception of half-fields for each eye.
Because eye dominance sets in, only 50% of the thalamus functions at its optimal level. When light is applied strictly to the non-dominant eye, the entire thalamus becomes stimulated, resulting in global cortical excitation. Monocular Eyelights therapy will stimulate the lesser functioning system, resulting in activation of all magno and parvo cell layers.
Recommendations: Monocular stimulation of the non-dominant eye
Upper field loss: Black component, Violet/Blue/Green lens, Top row brighter
Lower field loss: Black component, Red/Orange/Yellow lens, Bottom row brighter