But this operation should be performed in the spring, or at least before winter. Which circumstance, though it belongs to several places, it will be sufficient to mention once for all. For there are two kinds of cures; one, in which we are not at liberty to chuse a time, but that must be laid hold of, that offers, as in wounds and fistulas; another, in which we are not pressed for time; but it is quite safe and easy to wait the most convenient season; as is the case in these disorders, which both increase slowly, and are not extremely painful. In such, we must defer it till spring; or if there is any urgent circumstance, the autumn however, is better than the winter or summer; and of that the middle, when the excessive heats are gone, and the colds not yet set in. Now the more necessary the part is, whose cure shall be undertaken, the greater will the danger be it is exposed to. And often by how much larger the wound is to be made, so much the more must the season of the year be regarded.
Of an encanthis.
From the operation for the unguis, as I observed, disorders arise, which may also sometimes proceed from other causes. For sometimes after the imperfect excision of an unguis, or upon some other occasion, a tubercle grows in the angle, which hinders the entire opening of the eye-lids; the Greek name for it is encanthis[ GY ]. It ought to be laid hold of with a hook, and cut round; and here also the operator must be cautious not to cut away any thing from the angle itself. Then a small piece of lint must be sprinkled either with cadmia, or copperas; and the eye-lids being opened it must be introduced into that angle, and bound over in the same manner as the former; and for some following days must be dressed in like manner, first bathing it with water, just warm, or even cold water.
Of the ancyloblepharon.
Sometimes the eye-lids grow together, and the eye cannot be opened. Which is often attended with this disorder besides, that the eye-lids adhere to the white of the eye; that is when an ulcer in either of them has been negligently cured. For as it heals, what might, and ought to have been separated, will be agglutinated; both species of the distemper is called by the Greeks ancyloblepharon[ GZ ]. When the eye-lids only cohere, they are separated without difficulty; but sometimes to no purpose: for they are agglutinated again. However trial ought to be made; because the case often turns out well. Therefore the broad end of the probe must be introduced betwixt them, and the eye-lids separated by that; then small penecilla are to be put between them, till the ulceration of the part be cured. But when the eye-lid adheres to the white of the eye itself, Heraclides the Tarentine advises to cut under it gently with a knife with great caution, lest any thing be cut away either from the eye, or the eye-lid; and if that cannot be entirely avoided, rather to take something from the eye-lid. After these let the eye be anointed with such medicines as cure an asperity; and the eye-lid be inverted every day, not only that the medicine may be applied to the ulcer, but also to prevent its adhesion: the patient himself must also be charged to raise it often with two fingers. I do not remember an instance of one person cured by this method. Meges too tells us he tried many ways, and never was successful; for the eye-lid always adhered again to the eye.
Of the aegilops.
Again in that angle, that is next the nose, from some disorder, a kind of small fistula is opened, through which gum[(9)] perpetually distils; the Greeks call it ægilops[ HA ]. And this gives constant uneasiness to the eye; sometimes also eating through the bone, it penetrates to the nostrils. This sometimes is of a cancerous nature; when the veins are tense and crooked, the colour of it is pale, the skin hard, and irritated by a slight touch, and it raises an inflammation in the contiguous parts. It is dangerous to attempt the cure of those, that are cancerous: for it even hastens death. And it is needless to meddle with such as reach to the nostrils: for neither do they heal. But the cure of these in the angle may be attempted; though it should be known however that it is difficult; and the nearer to the angle the opening is, so much the more difficult, because there is a very little room for the management of the hand; yet it is easier to cure the disorder when recent. The top of the opening must be taken hold of with a small hook; and then all the cavity as I directed in fistulas, must be cut out to the bone; and the eye and other contiguous parts being well covered, the bone must be strongly cauterized with a hot iron. But if it be already affected with a caries, that a thicker scale may cast off, some apply caustic medicines; as copperas, or chalcitis, or rasile verdigrease: which method is both slower, and not so effectual. When the bone is cauterized, the remaining part of the cure is the same as in other burns.
Of hairs in the eye lashes irritating the eye.
The hairs of the eye-lids sometimes irritate the eye; and that from two causes. For sometimes the skin of the eye-lid is relaxed, and falls down; whence it happens, that the lashes are turned in upon the eye itself, because the cartilage is not also relaxed; at other times, beside the natural row of hairs, another grows under it, which point directly inward upon the eye. The methods of cure are these. If preternatural hairs have grown, an iron needle thin and broad, like a spatha[(10)], must be put into the fire, and when it is red-hot, the eye-lid being lift up in such a manner, that the offending lashes are in the view of the operator, it must be passed from the angle close to the roots of the hair, till it move over the third part of the eye-lid; then it must be applied a second and third time, as far as the other angle. The consequence of which is, that all the roots of the hairs being burnt, die away. Then a medicine to prevent an inflammation must be applied: and when the eschars have cast off, it must be brought to cicatrize. This kind heals very easily. Some alledge that it is proper to pierce the external part of the eye-lid near the eye-lashes with a needle, which must be passed through with a woman’s hair doubled for a thread; and when the needle has gone through, that the offending hair must be taken up into the loop of the woman’s hair, and by that drawn upward to the superior part of the eye-lid, and there to be glued down to the flesh, and a medicine applied to close up the orifice thus made: for that this will cause the eye-lash to point afterwards externally. This in the first place cannot be practised, but upon a pretty long hair; whereas they generally grow short there. And then if there be several hairs, the patient must suffer a long torture, and the needle passing so often through will raise a great inflammation. Lastly, when any humour is settled there, the eye being irritated both before by the hairs, and afterwards by the perforations of the eye-lids, it is hardly possible to prevent the glutinous matter, which fastens the hair, from being dissolved: and thus of course the hair returns to the place, from whence it was drawn away.
The method of cure for a relaxed eye-lid, which is universally practised, never fails of success. For the eye being closed, one must take hold of the middle part of the skin of the eye-lid, whether it be the upper or the lower, with his fingers, and raise it; then consider how much must be taken away, to reduce it to its natural condition. For there are two dangers attending this case; lest if too much be cut off, the eye cannot be covered; if too little, the end be not obtained, and the patient have suffered to no purpose. The part, which it shall be thought needful to cut, must be marked by two lines with ink in such a manner, that betwixt the range of hairs and the line nearest to it, some space may be left for the needle to lay hold of. These things being determined, the knife is to be used: and if it be the upper eye-lid, the incision next the eye-lashes must be made first; if the inferior one, last: and it must begin in the left eye, at the angle next the temple; in the right, at the angle next the nose; and what lies between the two lines must be cut out. Then the lips of the wound are to be joined together by a single stitch, and the eye must be covered; and if the eye-lid does not descend far enough, it must be relaxed; if too much, it must be either straiter drawn, or a small habenula again cut off from that lip of the wound, which is farthest from the eye-lashes. When it is cut off, other stitches must be added, not above three. Moreover a scarification must be made in the upper eye-lid, under the roots of the eye-lashes, that being raised from the inferior part they may point upwards: and this alone will be sufficient for the cure, if they are but little turned in. The lower eyelid does not need this process. When these are done, a spunge squeezed out of cold water must be bound on: the day following an agglutinating plaister should be applied. On the fourth, the stitches must be taken away, and the wound anointed with a collyrium, to prevent an inflammation.