Kitap 7
7
Also with regard to the discharge of a thin rheum which troubles the eyes, I have already explained what is to be done by means of medicaments. I come now to cases which demand surgical treatment. But we have remarked that in some the eyes never dry up, but are always moistened by a thin rheum; this keeps up trachoma, and upon slight provocation excites inflammations and ophthalmia, so troubling the patient all his life; and sometimes this cannot be remedied at all, but sometimes it is curable. This is the first thing to be decided, that in the latter case the patient may be relieved, in the former no surgical treatment may be applied. And in the first place, the treatment is useless in those who have had the disorder from infancy, of necessity it will continue to their dying day; again, it is not necessary in those cases where the discharge is scanty, though acrid, since they will derive no benefit from surgery; by medicaments and by the regulation of diet which renders the rheum thicker, they come back to health. Further, broad heads are hardly ever adapted to the treatment. Then it makes a difference whether the rheum comes from blood vessels between the skull and the scalp, or from those between the membrane of the brain and the skull. Generally those above the skull irrigate the eyes by way of the temples, those under it by way of membranes connecting the eyes with the brain. Now it is possible to apply a remedy to those blood vessels which lie above the bone — to those below it is not. Neither can patients be relieved in whom rheum is flowing down both ways, because although relieved in one direction, none the less trouble continues by the other. How the matter stands is to be learnt as follows. The head having been first shaved, those medicaments by which the rheum is checked in ophthalmia are smeared on from the eyebrow to the crown of the head. If the eyes begin to dry, it is clear that the moisture comes from those blood vessels which are beneath the scalp; if in spite of the application, they continue moist, it is manifest that the downflow of rheum is from under the skull. If there is humour but in less amount, the lesion is double. In the majority of patients, however, it is found that the superficial blood vessels are involved, and so also the majority can be relieved. This is well known, not in Greece only, but among other races too, so that no portion of the Art of Medicine has become more widespread among the nations of the earth. Some Greek practitioners made nine linear incisions into the scalp, two vertical ones in the occipital region, a transverse one above them; then two above the ears, with a cross-cut uniting them, three vertical ones between the crown and the forehead. Others were found who drew those lines directly from the vertex to the temples and having ascertained where the muscles began from the movements of the jaws, cut through the scalp over them with a light hand, and after the margins of the incisions had been retracted by blunt hooks, inserted lint, in order that the former edges of the skin should not unite, and that flesh should grow up in between so as to constrict the veins carrying humour to the eyes. Some even marked out with ink two lines, from the middle of one ear to the middle of the other, and from the nose to the crown. Then, where the two lines meet, they cut with a scalpel, and after blood has flowed out, they cauterized the bone there. But further, both on the temples and also between the forehead and crown, they likewise applied the red hot cautery to prominent blood vessels. A treatment frequently used is to cauterize the blood vessels on the temples, which indeed in this malady are usually rather swollen, but in order that they may be more distended and show up better, the neck is first bandaged moderately tight and the blood vessels then burnt with fine blunt cautery points until the flow of rheum to the eyes ceases. For that is a sign of the blocking up as it were of the channels by which humor was being carried. There is a more effectual means, however, when the blood vessels are thin and deep-seated, and so cannot be picked out, whereby the neck is bandaged as before, and the patient holds his breath, so as to make the vessels more prominent, and then those on the temples and between the fore-head and vertex are marked out with ink; upon this the neck is released, the blood vessels are cut into where marked and blood let flow; when enough has been let out, the vessels are burnt with fine cauteries; over the temples this is done cautiously lest the underlying muscles controlling the jaws feel it; between the forehead and the crown the cautery is applied firmly in order that a scale may become detached from the skull. Even more efficacious is the African method; they burn the crown of the scalp through down to the bone so that it may cast off a scale. But there is nothing better than the practice in transalpine Gaul; there they pick out blood vessels in the temples and crown of the head. Now I have already explained the treatment after cautery. I here add that there should be no haste, either in detaching crust, or in letting the ulceration heal after cauterization of blood vessels, lest haemorrhage burst out, or pus be too quickly suppressed, for whilst it is the object by the ulceration to dry up these parts, it is not the object to drain them out by bleeding; but if there is bleeding, such medicaments should be sprinkled on as suppress bleeding, but do not cauterize. With regard to the selection of blood vessels, and what is to be done when they are picked out, I will speak when I come to varicose veins in the leg.
