The international standard for optics drawing notations, ISO 10110, uses a set of coded notations to indicate optical tolerances and requirements to mitigate any ambiguity in an optics drawing. This set of notations can be very confusing for the uninitiated, but once understood, it simplifies communication between designer and manufacturer. This book provides a foundation for understanding the fundamentals of ISO 10110. It is meant as a guide for users to familiarize themselves with the notation and symbology, leading to a better understanding of the ISO 10110 drawing notation system. Its purpose is to explain not only the ISO 10110 drawing format but also the various other standards that enable a greater understanding and implementation of ISO 10110. Each chapter discusses different subjects of optical properties and tolerances, showing the implementation of ISO 10110 through various examples, each highlighting a separate subject or tolerance on an optical component drawing. A detailed example of an optical system is also provided.