People often feel happier and healthier on a sunny day. They may not
realize it, but exposure to sunlight enhances mood. During winter months,
when there is less sunlight, some people experience depression and fatigue.
This syndrome is called Seasonal Affective Disorder (SAD) and is treated
by light therapy.
How does light therapy work?
Light therapy extends daylight by giving the patient more light than he
or she would normally be exposed to during the winter. Treatment for SAD
begins in the fall and continues until early spring.
Light
therapy is used to
treat sleep disorders.
What
other conditions are treated with light therapy?
Light therapy is also used to treat sleep disorders. Patients with
sleep disorders are exposed to bright light in the morning, which
shifts their biological clock making them more fatigued in the evening.
This treatment benefits people suffering from shift work-related
fatigue, and delayed or advanced sleep.
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Are
there other types of light therapy?
Another form of light therapy uses light and infrared heat to treat
everything from acne to chronic conditions. Often practitioners
use ultra-violet light in conjunction with photo-sensitive drugs
to treat skin conditions and cancer. These treatments are under
development, and are best used as complementary therapies.
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