PresbyCor is a laser treatment software for presbyopia in LASIK and PRK. Designed for Alcon Wavelight lasers with a Custom-Q treatment module, the first version of PresbyCor was released in 2010. In 2020, a new version is born, embedding new settings in its algorithm and proposing three treatment strategies: Equi-Vision, Dual-Vision and Mono-Vision Optimized. The choice of strategy is based according to the visual requirements of the patient and the surgeon's philosophy. A treatment selection assistance system assists the surgeon in decision-making. PresbyCor is now available worldwide on mobile, tablet and computer. PresbyCor aims to: - Simplify the calculation of a laser treatment for presbyopia, - Optimizing patient satisfaction by offering a laser treatment adapted to their visual requirements, - Support the surgeon in his experience of presbyopic refractive surgery.