[The mechanism of cataract formation in persons with beta-thalassemia].

We examined 63 patients with beta-thalassemia whose ages range from 7 to 57 years. Lens opacities were presented in 14 patients--22%. The period these persons had transfusions and were submitted to iron chelating drug--deferoxamine and the concentration of there serum ferritin in the last seven years were noted.