<unk>  is an interdisciplinary branch of medicine that involves the study and application of light with respect to health and disease.<unk>  may be related to the practice of various fields of medicine including dermatology, surgery, interventional radiology, optical diagnostics, cardiology, circadian rhythm sleep disorders and oncology. A branch of<unk>  is light therapy in which bright light strikes the retinae of the eyes, used to treat circadian rhythm disorders and seasonal affective disorder (SAD). The light can be sunlight or from a light box emitting white or blue (blue/green) light.
Photomedicine
Paramedicine
Exomedicine
Bioptics 
Emergycare
Cryonics
Telehealth
EMedicine