Our Pirenoxine is yellow powder,Pirenoxine is for the prevention and treatment of cataract medicine. Pirenoxine can improve the metabolism of aromatic amino acids, inhibit the production of quinone compounds, so as to stabilize crystal turbidity or delay the development of the effect. The main treatment is old Chemicalbook annual cataract, diabetic cataract, also can treat traumatic cataract and congenital cataract. In addition, have certain influence to regulating function, have the effect that restraints eyesight to drop or promotes eyesight.