The Wound is fill'd with small dry Pledgets, and cover'd with a Plaister and Bolster: The Bandage is made with an Handkerchief folded triangular-wise, the ends of which are fasten'd behind the Head. If the Flesh grows too fast, it may be consum'd with the _Lapis Infernalis_; and if there be occasion to dilate the Wound, to facilitate the Exfoliation, it may be done with little pieces of Spunge prepar'd, and put into it. Afterward Causticks are to be us'd, to eat away the Callous Parts, which may be mingled with Oily Medicines, to weaken their Action, taking care, nevertheless, that the Eye receive no dammage by 'em. If the Bone be corrupted, a little _Euphorbium_ may be apply'd; or else the small Pledgets steept in the Tincture of Myrrh and Aloes; then the Ulcer may be handled as all others. * * * * * {216} CHAP. III. _Of the Operation of the _Cataract_._ This Operation is perform'd when there is a small Body before the Apple of the Eye, which hinders the Sight from entring into it; but it is undertaken only in Blew, Green, and Pearl-colour'd Cataracts, or in those that are of the Colour of polish'd Steel; and not in Yellow, Black, or Lead-colour'd. To know whether the Cataract be fit to be couch'd, the Patient's Eye must be rubb'd; so that if the Cataract remains unmoveable, it is mature enough; but if it changeth its place, it is requisite to wait till it become more solid. The Spring and Autumn are the most proper Seasons for performing the Operation. To this purpose the Patient being set down with his Eyes turn'd toward the Light, and having his sound Eye bound up, the Surgeon must likewise sit on a higher Seat, whilst the Patient's Head is held by a Servant; and his Eye being turn'd toward his Nose, is kept steady with a _Speculum Oculi_, which is a little Iron-Instrument made like a Spoon, pierc'd in the middle, so that the Ball of the Eye may be let thro' this Hole: Then the Surgeon taking a Steel-Needle either round or flat, accordingly as he shall judge convenient, perforates the Conjunctive at the end of the Corneous Tunicle, on the side of the little Corner of the {217} Eye, and boldly thrusts his Needle into the middle of the Cataract, which he at first pusheth upward, to loosen it with the Point of the Needle; and then downward, holding it for some time with his Needle below the Apple of the Eye. If it ascend again after it is let go, it must be depress'd a second time; but the Operation is finish'd when it remains in the same place whereto it was thrust; neither is the Needle to be remov'd till this be done, and the Cataract entirely couch'd. In taking out the Needle, the Eye-Lid must be pull'd down, and press'd a little over the Eye. _The Dressing and Bandage,_ Is to cause both the Patient's Eyes to be clos'd and bound up; then he must be oblig'd to keep his Bed during seven or eight Days, and some Defensative is to be laid upon the sore Eye, to hinder the Inflammation.