The idea originated in 1998 from research which suggested that systematic exposure to darkness might alter people's mood. More recently, with the discovery of intrinsically photosensitive retinal ganglion cells, it has been hypothesized that similar results could be achieved by blocking blue light, as a potential treatment for bipolar disorder.  
- [unreliable medical source?]Barbini, B.; Benedetti, F.; Colombo, C.; Dotoli, D.; Bernasconi, A.; Cigala-Fulgosi, M.; Florita, M.; Smeraldi, E. (February 2005). "Dark therapy for mania: a pilot study". Bipolar Disord. 7 (1): 98–101. doi:10.1111/j.1399-5618.2004.00166.x. PMID 15654938.
- [unreliable medical source?]Phelps, J. (2008). "Dark therapy for bipolar disorder using amber lenses for blue light blockade". Med. Hypotheses. 70 (2): 224–9. doi:10.1016/j.mehy.2007.05.026. PMID 17637502.
- Phelps J (2016). "A powerful non-pharmacologic treatment for mania - virtually". Bipolar Disord (Commentary). 18 (4): 379–82. doi:10.1111/bdi.12393. PMID 27218661.
- Henriksen, Tone; Skrede, Silje; Ole, Fasmer; Schoeyen, Helle; Leskauskaite, Ieva; Bjørke‐Bertheussen, Jeanette; Assmus, Jörg; Hamre, Børge; Grønli, Janne; Lund, Anders (26 May 2016). "Blue‐blocking glasses as additive treatment for mania: a randomized placebo‐controlled trial". Bipolar Disorders. 18 (3): 221–232. doi:10.1111/bdi.12390.
- Zagorski, Nick (18 August 2016). "Blue Light–Blocking Glasses May Reduce Bipolar Mania". Psychiatric News. American Psychiatric Association. Retrieved 24 April 2018.
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