This chapter on glaucoma provides a comprehensive overview of the disease, with a focus on high-yield notes for both clinical applications and ophthalmology exam boards. The chapter covers a wide range of topics, including primary and secondary glaucomas, tools and investigations for diagnosis and management, medical and surgical treatment options, and landmark trials in the field. The information presented is designed to be accessible and useful for both practicing clinicians and those preparing for board exams in ophthalmology. In addition, the chapter uses clear and concise language to explain complex concepts. Key points are highlighted throughout the text to help readers identify the most important information, and tables and figures are used to summarize and illustrate key concepts. Overall, the chapter on glaucoma is designed to be an effective study tool for those preparing for board exams in ophthalmology. By the end of the chapter, readers should have a solid understanding of the key concepts and best practices for managing patients with glaucoma.