Text-book of ophthalmology . Fia. 446. Fig. 447, Fig. 446.—Optical, Iridectomy. Magnified 2X1- Fig. 447.—Iridectomy in Increase of Tension. Magnified 2 X 1.—a a., external; i i,internal wound. See description under Fig, 402. [Where to place the iridectomy can be determined by the pear-shapedstop. This is a disk resembling in appearance Fig. 446, in that it has in itscenter a circular aperture 4 mm. in diameter, with an off-set notch 4 and mm. wide. The pupil is dilated with homatropine, and the disk isset as close to the eye as possible and with its central hole concentric with the
Text-book of ophthalmology . Fia. 446. Fig. 447, Fig. 446.—Optical, Iridectomy. Magnified 2X1- Fig. 447.—Iridectomy in Increase of Tension. Magnified 2 X 1.—a a., external; i i,internal wound. See description under Fig, 402. [Where to place the iridectomy can be determined by the pear-shapedstop. This is a disk resembling in appearance Fig. 446, in that it has in itscenter a circular aperture 4 mm. in diameter, with an off-set notch 4 and mm. wide. The pupil is dilated with homatropine, and the disk isset as close to the eye as possible and with its central hole concentric with thepupil. The disk is then turned until the patient sees best, when the posi-tion of the off-set notch will indicate the proper site for the iridectomy.—D.] 857. Other Indications for Iridectomy.—2. Increase of tension. Iri-dectomy is hence indicated in primary glaucoma, and also in secondary glau-coma resulting from ectasise of the cornea or sclera, from seclusio pupillse,from irido-chorioiditis, etc. In hemorrhagic
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