Clinical Guide
Smart532
™
A-18 UM-1151440EN, Rev. C, May 2016
Trabeculoplasty is used to control open angle glaucoma. Laser
burns are scattered around the trabecular meshwork. The
mechanism of action is believed to be the scarring and shrinking of
tissue at the laser burns, so that the trabecular meshwork between
the laser burns is stretched. This mechanical stretching is thought
to increase the outflow through the affected trabecular meshwork, thereby
reducing the IOP.
1. Laser burns are placed at the border of the pigmented and the non-
pigmented meshwork. Typical settings are a 50 µm spot size, a power
setting of 300-1000 mW and a pulse duration of 0.1 sec. The
immediate result of the laser burn should be a depigmentation of the
trabecular meshwork and/or minimal bubble formation at the site of
the laser burn.
2. Typically, 50 burns are homogenously spaced along 180° of the
trabecular meshwork. Usually the inferior 180° are treated first, since
this portion tends to be more pigmented and laser energy is hence
better absorbed.
3. IOP should decrease within several weeks. Usually, this decrease is
maintained for 1-2 years or more.
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● P. Romero-Aroca, J. Reyes-Torres, M. Baget-Bernaldiz and C. Blasco-
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Bibliography
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