History of gonioscopy.- How to perform gonioscopy.- Anatomical structures of the chamber angle.- Grading systems of the chamber angle width.- Development of the chamber angle and developmental disorders.- The chamber angle in primary open-angle glaucomas.- The chamber angle in primary angle-closure glaucomas.- The chamber angle in secondary open-angle glaucomas.- The chamber angle in secondary angle-closure glaucomas.- Laser in the chamber angle.- Operations in the chamber angle.- Influence of medications to the chamber angle.- Alternatives to gonioscopy.