Ví dụ công khai
Professor Rosas, in his last work on Diseases of the Eye (Lehre von den Augenkrankheiten, Wien, 1834, p. 326), distinguishes three kinds of glaucoma, viz. glaucoma of the hyaloid, glaucoma of the retina, and glaucoma of the choroid. He makes no mention of lenticular glaucoma, which is much more common than any of the three which he particularizes. Indeed, vitreous, retinal, and choroidal glaucomata, are, to say the least of them, rare diseases.