=The Dislocation of Morgagnian Cataracts.=--A curious error is to be found pervading many of the early writings on couching--viz., that a Morgagnian cataract could not be couched in its capsule. Our hospital experience in India proved that this idea was erroneous, and the examination of our pathological specimens has shown the correctness of our clinical deductions. The Morgagnian lens may be dislocated forward into the anterior chamber, backward into the vitreous, and even through the coats of the retina, without rupture of its capsule. This is far from being a surprise to any surgeon who has operated on a number of these cases, for the Morgagnian capsule is usually very much tougher than that of any other form of cataract. It has already been mentioned that, if the capsule bursts, the nucleus may escape, and may then sometimes be found either floating freely in one of the chambers of the eye, or fixed in one position by inflammatory adhesions, or, still more rarely, passing from chamber to chamber at intervals. The writer has observed that in some cases the escape of Morgagnian fluid into an eye appears to cause great irritation. The same fact has been observed by some of the early writers on couching. INDEX A Abu el Kasim, 2, 4 Accidental injuries during couching, 46 Advocacy (modified) of couching, 10, 11, 12 Ægineta, Paulus, 3 Age of patient, usual in couching, 27 Albertotti, 10 Alexandria, ophthalmic surgeons in, 1 Anæsthesia during couching, 15, 21 Anatomical examination of couched eyes, by Collins, 11; by Hudson, 11; by Kirkpatrick, 11; by Parsons, 10 Anterior chamber, 55 albuminous exudates in, 56 blood in, 56 lens matter in, 56 pus in, 56 scantiness of contents, 55 vitreous substance in, 56 Anterior operation, 14 Antiquity of couching, 1 Antillus, 7 Apology for the coucher, 23 Avicenna, 2, 3, 4 B Bartisch, 5 Basso, 11 Bell, Benjamin, 7 Benvenuto, 4 Bland-Sutton, Sir John, 1 Brisseau, Pierre, 7 C Capsulo-corneal synechia, 46 Cataracts, entangled in vitreous exudate, 39, 81 fixed in vitreous chamber, 40, 80 floating freely in vitreous, 39 matted in inflammatory tissue, 43 peculiarities of, in India, 32 Causes of failure after couching, 28 Celsus, 1, 2, 3, 7, 90 Charlatanism, 6, 7, 20 Chemotaxis, 61, 63 Choroid, 73 changes in, due to hypotony, 73 detachments of, 73 Choroidal vessels unusually distinct, 74 Collins, E. T., 11, 12, 73 Comparison of depression and reclination, 88 of pain after couching and after extraction, 86 of scleral and corneal routes for operation, 89 Condemnation of couching, 11, 22, 26, 77 Copper probe, 16, 17, 51 Cornea, fistula of, 46, 78 scars in, 16, 46, 78 Coucher, descriptive titles of, 19 Coucher’s methods, 20, 33 Cusson, 7 Cyanopsia, 32 D Dark Ages, couching in, 6, 20 Daviel’s extraction, 7