Contact lenses are categorized into various types, each tailored to address specific vision needs. While hard contact lenses are largely obsolete, modern rigid gas permeable lenses are now the industry standard, offering enhanced comfort, oxygen permeability, and customization. Soft contact lenses have also evolved significantly. From the first generation of Polyhydroxyethyl methacrylate and copolymer lenses, pioneered by Otto Wichterle, to today’s silicone hydrogels, advancements in materials have led to increased comfort and breathability, making them a popular choice. Hybrid lenses combine the sharp optics of RGP lenses with the comfort of a soft lens skirt, offering a unique solution for those seeking both visual acuity and ease of wear. This chapter delves into the crucial aspects of contact lens design for optimal vision correction. It explores spherical contact lenses, explaining spherical curvature, base curve radius, and manufacturing constraints. The chapter then introduces toric contact lenses, designed to correct astigmatism, highlighting their specific features and benefits. Finally, it summarizes the numerous advantages of contact lenses, such as a wider field of vision, suitability for active lifestyles, and cosmetic benefits, encouraging readers to consult with an eye care professional for personalized advice.