Abstract: People with poor vision have difficulty in using their mobile phones because of the relatively small size of the screens. In order to help them to see more clearly, we designed several magnification lens for mobile phones with ZEMAX. After analyzing the features of the magnification lens used in mobile phones, we found that the aspheric lens could reduce the thickness of the lens and achieve better image quality on the periphery. At last, we designed several mechanisms for coupling the lens with the mobile phones and overcame the drawbacks of the current magnification lenses for mobile phones.