IMAGE No. 1 The computer-based electro-optical devices of the Ratok®derm equipment determine with high accuracy the optimal dose of the microphotoenergy UV "injection" required to stimulate melanin production by inert melanocytes. This results into a customized treatment without overdose risks, as shown by the lack of side effects recorded in the 2,000 patients treated so far during 30,000 therapy hours performed in 60,000 Ratok®therapy sessions.