UV Ray :- http://www.youtube.com/watch?v=XnrnDSlS48I

UV Ray Phototheraphy  :-

1.Narrowband UVB :- Now considered the gold standard of treatment for vitiligo covering more than 20% of the body . Narrowband UVB (NB) uses the portion of the UVB spectrum from 311-312 nm. This region has been determined to help stimulate pigment cells to produce melanocytes in less time than it takes to burn the skin . Any kind of light therapy has a suppressive effect on the immune system , so it can possibly stop new areas from forming as well. NB can be done in the doctor's office with a full-body cabinet or, with a doctor's prescription , from home using a full-length panel or a handheld device . The handheld are very convenient for small areas of vitiligo but are too tedious and cumbersome to use for larger percentages as they cover a very  small area at a time . NB is sometimes used in combination with other topical treatments, but is effective for many on its own. NB can be used on children old enough to stand still and keep goggles on . Results are often seen beginning between 30 to 60 treatment is usually given 3 time a week. Potential side effects of NB include burning if used for too long. If using a full-body panel or box , the normal skin may tan , increasing the contrast . Only full sized body units provide the immune suppression needed for stabilization that may halt further pigment loss , a the handheld units only treat isolated areas . As long as the patient is old enough to understand that they must keep their eyes closed at all times , and has as annual eye exam , research has shown that it is safe to expose the eyelid to NB-UVB light . The exception to this would be if a psoralen had been used.

2. Psoralen Plus UVA Light (PUVA) :-

 Formerly the gold standard of treatment , PUVA has mostly been surpassed by NB-UVB as NB-UVB is at least as effective and has fewer side effects .  The psoralens are typically taken orally ,  but can also be used topically . A UVA light box or sun may be used to provide the light  component . Melaginina that is available in countries outside the US is a psoralen and must be used with caution and under a doctor's care .Treatments are usually given 3 times per week . Side effects of PUVA include burning , stomach upset , liver issues , and cataracts .  To prevent the possibility of cataract formation you must wear sunglasses , which protest your eyes against UVA , for 12-24 hours after taking the tablets. Sunglasses labeled uv 400/UVB/UVA protection 100% are recommended. PUVA  is used less often in children because of the risk of side effets.