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Image registration platform enhances toric IOL placement
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CHICAGO – A three-dimensional imaging and registration platform enhances the accuracy of limbal relaxing incisions and toric IOL placement, a speaker said here.
During Refractive Subspecialty Day preceding the American Academy of Ophthalmology meeting, Robert J. Weinstock, MD, described the TrueGuide system (TrueVision).
Robert J. Weinstock
“You have a marriage here of a lot of different components: good preoperative data, intraoperative maneuvers that you’re customizing yourself . . . feeding information from the laser into the operating room and, finally, a feedback loop that allows a customized nomogram to be delivered to help us do a better job without burdening us with all of this challenging math and things that we fight when we try to pick the right lens,” Weinstock said.
The system uses the Cassini Corneal Analyzer (iOptics).
“The Cassini takes into account the posterior corneal component of astigmatism, which is probably one of the missing links that we’ve had,” Weinstock said.
TruePlan Surgical Planning, a software package, uses preoperative axis of astigmatism and posterior corneal data captured with the Cassini. The data are fed into the laser, along with preferred wound locations.
The software determines a new axis of astigmatism to guide toric lens or limbal relaxing incision (LRI) placement, and determines IOL power calculations.
Intraoperative aberrometry can also be used with the TrueGuide/TruePlan system.
The TrueGuide platform can be used with all toric IOLs and customized nomograms can be used with the system.
Images of the axis of astigmatism can be fed into the laser or overlaid onscreen to guide the surgeon in the operating room, Weinstock said.
Disclosure: Weinstock is a consultant for Alcon, Bausch + Lomb, Staar Surgical, TrueVision and Wavetec. He is also an equity owner with TrueVision and Wavetec.