A practical treatise on the diseases of the eye / To which is prefixed, an anatomical introduction explanatory of a horizontal section of the human eyeball, by Thomas Wharton Jones. From the 4th rev. and enl. London ed. With notes and additions by Addinell Hewson.
- William Mackenzie
- Date:
- 1855
Licence: Public Domain Mark
Credit: A practical treatise on the diseases of the eye / To which is prefixed, an anatomical introduction explanatory of a horizontal section of the human eyeball, by Thomas Wharton Jones. From the 4th rev. and enl. London ed. With notes and additions by Addinell Hewson. Source: Wellcome Collection.
Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.
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![been taken for ova, were very distinct, as well as the four lateral suckers, which appeared as if covered, each of them, witli a minute enchased cornea, darkened witli pigment. The liydatiil is preserved in the Aiiatoniical Museum of Glasgow College, and Plate IL. Fig. (J, is a sketcii of its appearance magnified about 0 diameters, which I owe to tlie kind- ness of Professor Allen Thomson. Next day, the patient felt (piite well; the eye appeared natural, and she said she saw as well witli it as the other. No reaction followed, and she was dismissed on the 21st October. I was led to think it probable, that the attack of ophthalmia in June, immediately pre- ceding the appearance of the hydatid, was owing to the development of its ovum in one of the bloodvessels of the iris or choroid; and tlnit the inflammation ceased suddenly as soon as the hydatid dropped into the anterior chamber, where it lived at its ease, amply furnished with sustenance from the atjuoous humor, and unrestrained by any extei'nal cyst, such as that which surrounds the same entozoon when lodged among the muscles. vVs it was resolved to extract the hydatid by an incision througli the cornea, 1 tried no application to the eye with the view of killing it, such as the vapor of hydrocyanic acid, which, it was suggested, miglit perhaps have that effect, lest the entozoon, being killed, might excite inflammation, which it had evidently not commence<l to do since assuming its place in the aqueous humor; and lest the very means used to dispatch it miglit cause irritation of tlie eye, and thereby render the operation more hazardous. Had the patient been younger and not very staid, I should have put her under the in- fluence of chloroform before proceeding to the operation. The result of Mr. Logan's case, operated on by Dr. Robertson, shows the danger to be apprehended from restlessness of the patient, under similar circumstances. Case 424.—Samuel Byrne, aged 28 years, a silk-dyer from Macclesfield, was admitted into the Glasgow Eye Infirmary, 22d September 1850, about a year before which date ho bad obsei'ved his left eye become intolerant of light, and the sight of it to be dim. This was followed, in about a fortnight, by the appearance of an opaque object in the anterior chamber, and this about eight months ago was recognized to be a cysticercus cellulosse. The eye has never been red nor painful. The hydatid has gradually increased in size, so that the tail-vesicle completely covers the pupil. It is semi-transparent, so that the pupil is seen through it; it is observed changing its figure from time to time. The neck and head are gi'eatly developed, being nearly half an inch long, and fully one-twentieth of an inch thick. The neck is contracted at four or five different points; the head is apparently fixed between the iris and the cornea at their temporal edge. (Plate II. Fig. 5.) The hydatid prevents the patient from seeing any object with the left eye, which is merely sensible to light and shade. 23d. The cysticercus, and especially its head, more lively. Its lateral suckers distinctly visible with the ophthalmic microscope, and from the centre of the rostellum a minute conical body is seen to be darted and retracted from time to time. The tail-vesicle is covered with white strife. Says he is not aware of ever having been troubled with worms in childhood. Has been in the way of eating wild rabbits. 27th. In presence of Professor William Thomson, Professor Allen Thomson, Mr. Yaux, of ^lacclcsfield, and a number of other gentlemen, I proceeded to extract the hydatid, as in the last case. Having made a puncture at the temporal edge of the cornea, with Beer's pyramidal knife, I introduced Schlagintweit's hook, and seized the neck of the hyatid close to the head. The hyatid, much more developed, was also much softer than in Gor- don's case, for, on attempting to withdraw it, the head broke off. I then seized the neck nearer to the tail-vesicle, and again the neck broke off. Part of the neck projecting from the wound, I seized it with a small forceps, and the remainder of the hydatid, including the whole of the tail vesicle, readily came away. No protrusion of the iris took place, so that the pupil retained its natviral place and size. Strips of court plaster were applied over the eyelids of both eyes, so as to keep the eyelids from moving. 3d October. He has been up and going about for three days. Eye perfectly well. The portions of the hydatid were carefully put together by Professor Allen Thomson, and form a preparation in the Anatomical Jluseum of Glasgow College. Plate II. Fig. 7, shows the appearance of the head and neck, magnified about 12 diameters. Case 425.—]Mr. Canton has put on record' the case of a boy, about ten years of age, in whom a gradual diminution of the vision of one eye having occurred, with a hydroph- thalmic state of the anterior chamber, and of such haziness of the cornea as completely to obscure the iris from view, the eye being also painful, an opening was made through the most prominent part of the cornea with a cataract-knife, so as to evacuate a small quantity of aqueous humor, along with what was suspected to be the lens and vitreous body, but which turned out, on being examined by Mr. Wharton Jones, to be a large cysticercus. The wound healed readily, and the lad was released from his suffering. Six or seven months from this period, the boy again applied at the Royal Westminster](https://iiif.wellcomecollection.org/image/b21014760_1019.jp2/full/800%2C/0/default.jpg)
