The book highlights the main issues related to congenital, primary and secondary glaucoma, including the mechanisms of formation of intraocular pressure, patterns that determine the hydrodynamics and hydrostatics of the eye, pathogenesis and features of glaucomatous lesion of the optic nerve. The clinical picture, diagnosis and differential diagnosis of various clinical forms of glaucoma are described. The problems of selection and optimization of glaucoma treatment methods are discussed in detail. The book is designed for ophthalmologists.