White light therapy is a treatment that uses a light box to mimic outdoor light, primarily to treat Seasonal Affective Disorder (SAD) and other conditions affected by light exposure. The goal is to stimulate the brain to ease symptoms.
Here's a breakdown of how it works:
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Mechanism: It is thought that the artificial light may induce a chemical change in the brain, which helps elevate mood and alleviate symptoms of SAD, such as fatigue and oversleeping.
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Light Box Specifications: A typical light box used in white light therapy should:
- Provide an exposure to 10,000 lux of light. (Lux is a unit of illuminance, measuring the amount of light that falls on a surface).
- Filter out harmful ultraviolet (UV) light.
- Be used according to a healthcare professional’s recommendations regarding duration and timing.
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Conditions Treated: While primarily used for SAD, white light therapy may also be used for:
- Other types of depression.
- Sleep disorders.
- Circadian rhythm disorders.
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How to Use: The light box should typically be placed at a comfortable distance and angle, so the light enters the eyes indirectly. You should avoid looking directly into the light. A typical session lasts around 20-60 minutes, often in the morning.
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Important Note: It's crucial to consult a healthcare professional before starting light therapy, especially if you have any pre-existing eye conditions or are taking medications that increase light sensitivity. They can determine if it is appropriate for you and provide specific guidance.
