Purpose: To evaluate the iris movement after Yag laser peripheric iridotomy, that is a proposed treatment for the posterior iris bowing observed in pigmentary dispersion syndrome. Methods: The posterior iris bowing is described like one of the etiologic mechanism in the pigmentary dispersion syndrome, because of the rubbing of the posterior iris face with the zonula. We present a pa- Purpose: To evaluate the iris movement after Yag laser peripheric iridotomy, that is a proposed treatment for the posterior iris bowing observed in pigmentary dispersion syndrome. Methods: The posterior iris bowing is described like one of the etiologic mechanisms in the pigmentary dispersion syndrome, because of the rubbing of the posterior iris face with the zonula. We present a pa-