Beer is remembered for his textbook; the doctrines in it dominated practice for many years. He described the symptoms of glaucoma and noted the luminosity of the fundus in aniridia. He also presented for the first time the general principles of treating post-traumatic inflammations, including penetrating and perforating injuries as well as injuries to the orbit. He describes the first use of the loupe for the examination of the living eye. The plates in this work were both hand-colored and signed by Beer. He was a distinguished iridectomist. Many of his pupils became famous ophthalmic surgeons. Beer opened the first known eye hospital, in 1786, in Vienna. English translation, Glasgow, 1821.