ABSTRACT Objective: To develop and validate a smartphone application capable of magnifying near images and, through educational videos, informing users about presbyopia. Methods: This was a cross-sectional, quantitative study conducted by a multidisciplinary team of ophthalmologists and software engineers. The development and validation of the application, named PRESB, occurred in three main stages. First, the user interface and native functions were designed. Second, the application was tested by patients who had undergone bilateral age-related cataract surgery with implantation of a […]