Lights are used to repigment the skin. Light therapy uses excimer laser to treat vitiligo. For the procedure, the patient may have to sit in a light box or receive excimer laser treatments. Light box will be able to treat widespread vitiligo whereas; laser will only be able to treat small area. Lasers are effective on face and less effective on hands and feet. Studies found that excimer lasers are effective for 70% of the patients.
The main disadvantage with light therapy is that, the results are not long lasting. In most cases, the results disappear within 1 year after completing the treatment. The treatment requires time commitment. The patient will have to continue the treatment for several weeks. Lasers are also applied in combination with topical corticosteroid.
Computerized whole body photo therapy exclusively only for melanosite patients at special rates