The student's guide to diseases of the eye . om dust, &c. Position:recumbent; the surgeonstands behind the seldom neces-sary. Instruments : a hornor bone lid-spatula (, s), or a lid clamp (), a Beers knife (), and forceps. Makean incision from end to end(beginning just outside thepunctum) between thehair-follicles and Meibo-mian ducts, as if to split the lid into two make a second incision through the skin andtissues, about a twelfth of an inch from the border ofthe lid, parallel with, but in a plane at right angles to,the first. The strip o
The student's guide to diseases of the eye . om dust, &c. Position:recumbent; the surgeonstands behind the seldom neces-sary. Instruments : a hornor bone lid-spatula (, s), or a lid clamp (), a Beers knife (), and forceps. Makean incision from end to end(beginning just outside thepunctum) between thehair-follicles and Meibo-mian ducts, as if to split the lid into two make a second incision through the skin andtissues, about a twelfth of an inch from the border ofthe lid, parallel with, but in a plane at right angles to,the first. The strip of skin and tissues included be-tween these two cuts will now be almost free, exceptat its ends, which are to be united by a cross-cut, andthe strip dissected off; it should include the hair-follicles in their whole depth. Examine the whiteedge of the cartilage, now exposed, for any hair-follicles accidentally left behind ; they will appear asblack dots, and are to be carefully removed. In the same or slighter cases, the inversion of the. Fig. 118. — Snellens lidclamp (for the R. upperlid). 324 OPERATIONS border of the lid may be much lessened by completedivision of the cartilage from the conjunctivalsurface along a line parallel with, and 3 mm. from,the free border (Burows operation) (Fig. 120, Bu).The wound gapes and the inverted border of the lidfalls forward and is kept in its natural place by thecornea. The only instruments needed are a scalpel andscissors. Position as for 1, or recumbent. The lid iskept well everted whilst the incision is being puncture is made with the knife parallel to the edgeof the lid, close to the inner or outer end, one bladeof the scissors passed in and made to run along theouter surface of the cartilage between it and theorbicularis muscle, and then the cartilage dividedby closing the blades parallel to the border. Thewound should be at right angles to the surface. A bluish line should beseen through the skin onreplacing the lid. Thisoper
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Keywords: ., bookcentury1800, booksu, booksubjecteye, booksubjectophthalmology
