Excimer Therapy :
Excimer 308-nm light is a form of targeted phototherapy that delivers a specific wavelength (308 nm) of ultraviolet B (UVB) radiation using an excimer laser or an excimer lamp. Both have shown similar results regarding efficacy, but have technical differences.
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The UV ray generated by the excimer light is delivered via a hand-held wand that focuses on the lesion. Compared with narrowband UVB, its advantages are:
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Healthy skin surrounding the affected areas is not exposed to radiation
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Different templates are used according to the area to be treated
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A higher dose of radiation can be delivered, with a reduced cumulative dose of irradiation
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In some cases, a shorter course of treatment is effective
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It can be used in areas difficult to reach with conventional phototherapy, such as ears and genitals
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It can be used in children, as it is a relatively friendly–looking piece of equipment.
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Excimer laser therapy is an option for the treatment of localised vitiligo and moderately severe localised psoriasis and unresponsive to topical treatments.