A Treatise On Ophthalmology for the General Practitioner
A Treatise On Ophthalmology for the General Practitioner
Adolf Alt
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Septic embolism will cause purulent inflammation of the ret- ina and other structures of the eye. In thrombosis of the central retinal vein the arteries appear also very thin, but the veins are usually greatly enlarged, and DISEASES OF THE RETINA. 169 a number of haemorrhages are seen in the retinal tissue. It may also affect but one branch of the central vein. It is due to heart disease and senile changes in the walls of the bloodvessels. When facial erysipelas causes blindness, as it sometime...s does, it may be due to thrombosis of the central vein pro- duced by the inflammation and swelling of the orbital tissue {Knapp). %^Z. Another form of more or less sudden blindness owes its origin to the detachment of the retina from the choroid. This is due either to an effusion of a serous fluid between the two membranes, (and in this manner it is most apt to occur in eyes suffering from a high degree of myopia), or it follows the shrinkage of the vitreous body from some cause or other (loss during an operation or injury, fibrinous degeneration).
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