Photomedicine

Photomedicine is an interdisciplinary branch of medicine that involves the study and application of light with respect to health and disease.[1][2] Photomedicine 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 photomedicine 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.

Examples

Photomedicine is used as a treatment for many different conditions:[3]

  • PUVA for the treatment of psoriasis
  • Photodynamic therapy (PDT) for treatment of cancer and macular degeneration - Nontoxic light-sensitive compounds are targeted to malignant or other diseased cells, then exposed selectively to light, whereupon they become toxic and destroy these cells phototoxicity. One dermatological example of PDT is the targeting malignant cells by bonding the light-sensitive compounds to antibodies to these cells; light exposure at particular wavelengths mediates release of free radicals or other photosensitizing agents, destroying the targeted cells.[4]
  • Treating circadian rhythm disorders[5]
  • Alopecia, pattern hair loss, etc.[6]
  • Free electron laser
  • Laser hair removal
  • IPL
  • Photobiomodulation
  • Optical diagnostics, for example optical coherence tomography of coronary plaques using infrared light
  • Confocal microscopy and fluorescence microscopy of in vivo tissue
  • Diffuse reflectance infrared fourier transform for in vivo quantification of pigments (normal and cancerous), and hemoglobin
  • Perpendicular-polarized flash photography and fluorescence photography of the skin
gollark: Or just approximate the brain so it can be computed more easily without losing too much accuracy.
gollark: Well, the brain part is harder, but if you can work out the brain's I/O enough, that can just be simulated in detail and the rest to... really accurate computer game level.
gollark: I mean that just for a human-livable environment you don't need to actually simulate, say, particle interactions, at all.
gollark: You don't need to simulate things *exactly*, which helps.
gollark: So the universe's magic anti-paradox feature is forced to calculate it for you, or this generates some sort of really unlikely failure mode in your computing system.

See also

References
  1. Moore, Kevin (2013). "Photomedicine: the early years". Photomedicine and Laser Surgery. 31 (12): 563–4. doi:10.1089/pho.2013.9870. PMID 24251929.
  2. Smith, Kendrick C. (1981). "Photobiology and Photomedicine; The Future Is Bright" (PDF). The Journal of Investigative Dermatology. 77 (1): 2–7. doi:10.1111/1523-1747.ep12479186. PMID 7252254. Retrieved 14 July 2014.
  3. Davidson, Tom. "Photomedicine Uses and Research". NISIM. Archived from the original on 4 March 2016. Retrieved 10 January 2016.
  4. Lui, H (1993). "Photodynamic therapy in dermatology: recent developments". Dermatologic Clinics. 11 (1): 1–13. doi:10.1016/S0733-8635(18)30277-8. PMID 8435904.
  5. Dement, William C. "Disorders of the Sleep/Wake Cycle". Stanford University. Retrieved 10 January 2016.
  6. Richards, Rebecca (6 June 2017). "Applications of Photomedicine". Sample Hime. Retrieved 26 November 2017.

Further reading


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