Non-contact direct selective laser trabeculoplasty: light propagation analysis

Biomedical Optics Express
Zachary S SacksMichael Belkin


Selective laser trabeculoplasty (SLT), used to treat glaucoma and ocular hypertension, requires the use of a gonioscope placed on the cornea to visualize and irradiate the trabecular meshwork (TM). Alternatively, non-contact direct SLT (DSLT) irradiates the TM through the overlying tissues. Here we analyze this innovative procedure using analytical modeling and Monte Carlo simulations to quantify the laser energy reaching the TM through the overlying tissues. Compared with energy launched from the laser, DSLT energy transmission to the TM is 2.8 times less than SLT, which verifies the efficacy of non-contact DSLT given the lowest reported effective SLT energies.


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Jan 21, 2021·Current Opinion in Ophthalmology·Marc Töteberg-Harms, Frances Meier-Gibbons
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