What is excimer 308-nm light treatment?
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.
Patients attend 1–3 times weekly. The amount of UV delivered is carefully calculated and monitored taking into account the skin type, age, skin condition, site and response to treatment.
The duration of treatment is shorter than for whole body phototherapy. Some response may be noted as early as 6–8 treatments and complete response may take 20–30 sessions. The average length of treatment is about seven weeks.
Excimer laser therapy is an option for the treatment of localised vitiligo and moderately severe localised psoriasis and unresponsive to topical treatments. It is often combined with topical therapies to enhance response.