Abstract : Acute glaucoma crisis is an emergency in ophthalmology. Ocular and systemic clinical signs are typical and due to a paroxystic and severe increase of intraocular pressure. It is a biometric disease: little eye with a big lens. Main factors triggering the acute crisis are: stress, sympathicomimetics, parasympathicomimetics and parasympathicolytics drugs. Treatment is surgical: iridectomy, cataract extraction, trabeculectomy or combined surgery