This book bridges the gap between engineering and manufacturing of lens design to clinical practice. It provides advances in refractive correction in ophthalmic optics with focus on current and future intraocular lenses. Challenges for lenses with premium features including extended depth of focus and integrated functions are also presented. An introduction of selected aspects of ophthalmic optics is provided before moving directly to presentations of ametropias, quality, lens prescription and lens add-on features. The selected mathematical formulations is presented to better understand the principle and/or the design. Each chapter will feature a summary highlighting the most critical information. Smart lens solutions for the experienced lens designer is provided, presenting a comprehensive understanding of the constraints of ophthalmic lenses. It serves as a reference to any professional in the vision science sector, including design, manufacturing and assembly, and practicing ophthalmologists by providing a clear overview of potential limitations of lenses.