Presbyopia is one of the inevitable, irreversible processes due to increased entropy in physiological systems that affects everyone in older age. In presbyopia, the focal point of light rays changes away from the retina, which prevents a person from seeing close objects well. Currently, there are prototypes of liquid-lens glasses under construction, which have the capability of changing the focal length in order to resolve this deficiency. This research aims to devise a method to change the focal length of these glasses without the need for a user’s hands. The blink detection method is chosen to receive this command. For this purpose, there is a widely used method of electrooculography signal (EOG), but the method of using the triboelectric nanogenerators (TENG) has a more appropriate output. Based on the electrostatic effect, these sensors can detect minute mechanical displacements well. In this research, an attempt has been made to implement and detect the user’s skin slight movements during blinking by pasting the TENG sensor on the user’s face skin. At first, TENG basic principles are studied, and appropriate materials and methods are selected to build this sensor. Moreover, according to previous reported research results, the sensor should be properly tested and the output, being the electrical potential difference, is compared to the accredited scientific articles for validation. After this validation, the effective factors for improving this sensor output should be investigated for obtaining better results in contrast to the previous research. This project is mostly based on the validation and feasibility of sensor manufacture based on the TENG process. Keywords: Presbyopia, Multifocal glasses, Focal length, Triboelectric effect, Triboelectric sensor, Blinking, TENG, Vertical contact-separation mode, Electrostatics effect