Text-book of ophthalmology . [Fig. 444.—Instruments for Iridectomy and , straight lance knife, b, angular lance knife. Used in iridectomy (page 973), paracentesis(page 967), simple linear extraction of cataract (page 991). c,d, e, iris forceps for passing into the woundmade by the lance knife and grasping the iris. /, Tyrrels blunt iris-hook used when the lens is absentor dislocated, g, curved scissors for excising the iris, h, De Weckers scissors (pince ciseaux)., i, com-bined spatula and blunt-pointed probe. Other instruments required are a spring speculum orDesmarre sretractor, t
Text-book of ophthalmology . [Fig. 444.—Instruments for Iridectomy and , straight lance knife, b, angular lance knife. Used in iridectomy (page 973), paracentesis(page 967), simple linear extraction of cataract (page 991). c,d, e, iris forceps for passing into the woundmade by the lance knife and grasping the iris. /, Tyrrels blunt iris-hook used when the lens is absentor dislocated, g, curved scissors for excising the iris, h, De Weckers scissors (pince ciseaux)., i, com-bined spatula and blunt-pointed probe. Other instruments required are a spring speculum orDesmarre sretractor, to keep the lids apart, and a fixation forceps to hold the eyeball (see Fig. 400).— 976 TEXT-BOOK OF OPHTHALMOLOGY theless, the sphincter should remain behind, we enter the anterior chamber again witha blunt hook and draw up the bridge of sphincter in order to cut it off. There may,however, be another reason why the sphincter remains in situ, namely that it is sofirmly adherent to the lens capsule that it tears away fr
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