ABSTRACT
This chapter focuses on the importance of gonioscopy, normal and abnormal angle anatomy, gonioscopic techniques, and the major classification schemes as well as intraoperative and postoperative gonioscopy. Gonioscopy at an early stage of glaucomatous disease separates narrow from open angles, which will allow for appropriate laser therapy and preservation of vision. Routine gonioscopy reveals wide variations in chamber depth, iris processes, ciliary body band width, angular approach, trabecular pigment, and vessels. Gonioscopy is important for family members of angle-closure glaucoma patients for they are more likely to have occludable angles, especially noted by a marked anterior convexity that is five times greater than that of controls. One of the stumbling blocks related to gonioscopy is the concise documentation of angle findings. Gonioscopy is an immensely useful adjunctive tool to diagnose and treat eye disease. A thorough understanding of normal is a prerequisite to appreciate early angle pathology.
