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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Br J Ophthalmol. 2013 Dec 12;98(5):579–585. doi: 10.1136/bjophthalmol-2013-304256

Figure 1.

Figure 1

Procedures enhancing conventional outflow by degree of angle access. Left half: trabecular meshwork bypass stents (counter clockwise): a) iStent Inject, b) iStent G1 and c) Hydrus. Right half: trabecular meshwork ablation devices (clockwise): d) laser assisted endoscopic goniopuncture with single, circular entry and e) trabectome with plasma ablation tip that can remove TM up to 180° (blue half-circle arrows). The naturally segmented and discontinuous Schlemm’s canal limits the extent of access to drainage segments that can be achieved with bypass stents (Background canalography image courtesy of The Glaucoma Imaging Group, UPMC Eye Center, University of Pittsburgh School of Medicine).