Light therapy

Type:Uv phototherapy Time:2015-05-06 11:54:33 Light therapy or phototherapy (classically referred to as heliotherapy) consists of exposure to daylight or to specific wavelengths of light using polychromatic polarised light, lasers, light-emitting diodes, fluorescent lamps, dichroic lamps or very bright, full-spectrum light. The light is administered for a prescribed amount of time and, in some cases, at a specific time of day.

One common use of the term is associated with the treatment of skin disorders, chiefly psoriasis, acne vulgaris, eczema and neonatal jaundice.

Light therapy which strikes the retina of the eyes is used to treat circadian rhythm disorders such as delayed sleep phase disorder and can also be used to treat seasonal affective disorder, with some support for its use also with non-seasonal psychiatric disorders.

Skin conditions

Two forms of phototherapy exist: non-targeted phototherapy (from sunlight or a light box), and targeted phototherapy, in which light is administered to a specific, localized area of the skin. Current targeted phototherapy is administered via excimer laser, elemental gas lamp, or via LED light. Current FDA cleared devices on the market include XTRAC excimer laser,BClear, Theralight, and Psoria-Light LED phototherapy. Targeted phototherapy is administered in a doctor's office and is only administered to the affected skin, not the entire body, thus sparing healthy skin from UV rays which may lead to other health issues including skin cancer. While different wavelengths work for different conditions, treatment is most often done with narrow band UVB (NB-UVB) as this is the safest[wavelength. Non-targeted phototherapy can be delivered at doctor's office or at home via prescription (USA) using a booth, multidirectional unit, or wand.The unaffected skin is simply covered. Several devices are FDA-approved for home including the Panosol 3D and Richmond Light and Solarc Handheld.

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