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Figure 1: Sclerotomies in 25-gauge vitreous surgery. A sclerotomy by a 25-gauge trocar has an external linear entry wound that is either circumferential [1 and 2 (a); arrow (c)] or radial [3 and 4 (a); arrow (d)) to the limbus. The intrascleral path may be parallel to [2 and 3 (a)] or perpendicular to [1 and 4 (a)] the limbus. Forces acting perpendicularly across the sclera will close a sclerotomy with a radial external incision [arrows, 1 (b)], whereas forces acting tangentially along the sclera will close a sclerotomy with a circumferential incision [arrows, 2 (b)] |
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