light therapy


Definition of light therapy

: the treatment of medical or psychiatric conditions (such as seasonal affective disorder) by the controlled application of light

called also light treatment, phototherapy

Examples of light therapy in a Sentence

Recent Examples on the Web

Another category of hair-regrowth products is the relatively new devices that use low-level laser or light therapy (LLLT). Beth Wood, San Diego Union-Tribune, "Patchy success for most baldness treatments," 26 Aug. 2019 This might be surprising, considering that sunlight and light therapy are so commonly suggested to ease depression symptoms, but for some people, light has the opposite effect, says Dr. Rosenthal. Anna Borges, SELF, "7 Tips for Anyone Who Gets Depressed in the Summer," 21 June 2019 These include things like medication and light therapy, but each case of psoriasis is different, and the same treatments don’t work for everyone. Samantha Lauriello,, "Kim Kardashian Says Her New KKW Beauty Body Makeup Is Her ‘Secret’ to Covering Up Psoriasis," 17 June 2019 Instead of going to your dermatologist for red and blue light therapy (which can cost upwards of $100), use an at-home device over a blemish, or over your whole face, for just two minute. Marci Robin, Good Housekeeping, "10 Tried-and-True Ways to Get Rid of Pimples Fast," 14 June 2019 According to Psychology Today, treatment for symptoms of SAD include combinations of antidepressant medication, light therapy, Vitamin D, and counseling. Maya Mcdowell, House Beautiful, "8 Ways to Feel Happier at Home When Winter’s Bringing You Down," 15 Feb. 2019 Then the treatment is topped off with LED light therapy (another form of therapeutic electrical stimulation invented by NASA to help heal wounds while in space) over the face once the needles have been inserted. Roxanne Adamiyatt, Town & Country, "What Exactly Is Facial Acupuncture — And Why You Should Try It," 6 Feb. 2019 This often means light therapy, popularly transmitted by the SAD (Seasonal Affective Disorder) lamp. Lilah Ramzi, Vogue, "Is This the Original SAD Lamp? The Best Tropical Light Fixtures to Ward Off Seasonal Blues," 12 Oct. 2018 For chronic breakouts that can’t be resolved with over-the-counter salicylic acid or a faithful Proactiv protocol, light therapy is often the dermatologist’s go-to solution. Kari Molvar, Vogue, "Why Cross-Training Your Skin Is the Acne Solution Derms Swear By," 2 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light therapy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of light therapy

1935, in the meaning defined above

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Last Updated

22 Sep 2019

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The first known use of light therapy was in 1935

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More Definitions for light therapy

light therapy


Medical Definition of light therapy

: phototherapy especially : the use of strong light (as of 10,000 lux intensity) for the treatment of depression and gloom (as in seasonal affective disorder)

called also light treatment

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