Modelling the human eye and designing presbyopia correction with optical simulation software

The demands of more advanced presbyopia correction optics are rapidly increasing because of the fast-growing number of presbyopic population. Compared to the more conventional spectacle optics, contact lenses have multiple advantages including a larger field of view and better image quality. Since the contact lenses are not so easily removable, it is preferred to be optimized at multiple viewing distances, which increases its design complexity. In this article, we introduce the full process of designing, optimizing, and evaluating a multifocal simultaneous imaging contact lens for presbyopia correction based on the Chromatic Aspherical Gullstrand Exact (GAGE) human eye model in Zemax OpticStudio. Then, a comprehensive system-level optical analysis is performed on the optimized contact lens together with the human eye model in Speos under a realistic scenario.