As an extension component of the mobile phone terminal, I-FINGER collects images through a small camera on the fingertip, and transmits them to the mobile phone for recognition calculations. Finally, it is converted into voice information and transmitted to the visually impaired patients to meet the needs of assisting them to use the touch screen. I-FINGER continues the habit of visually impaired patients to perceive information through their fingertips, so there is no need for excessive learning costs for them. In addition, the "Y"-shaped gestur allows users to use touch screen terminals of any size and equipped with any operating system.