ORange™ Intraoperative Wavefront Aberrometer from WaveTec Vision Debuts at American Society of Cataract and Refractive Surgery Conference
April 5, 2009
WaveTec Vision announced yesterday the debut of the ORange™ Intraoperative Wavefront Aberrometer, which attaches to the surgical microscope and provides on-demand readings of sphere, cylinder and axis in approximately 2 to 5 seconds. The system also has a large dynamic range — -5 D to +20 D – making it ideal for intraoperative measurements. With ORange, refractive surgeons can obtain real-time measurements of the refractive state of the eye at any point during cataract surgery in contrast to the current standard of care which has surgeons evaluating the preoperative data, coming up with a surgical plan, executing it in the OR, and then playing a waiting game to see what the results are.
ORange uses a Talbot-Moiré-based interferometry to analyze the wavefront reflected out of the eye by relaying it through an optical system and directing it through a pair of gratings that are set at a specific distance from, and offset angle to, each other. The reflected light is diffracted as it passes through the gratings, creating a diffraction, or fringe pattern. This fringe pattern is captured by a camera and then processed using WaveTec Vision proprietary algorithms to create the measurement.
Initial applications for the ORange Intraoperative Wavefront Aberrometer are for guiding LRI’s and ensuring proper axis placement of toric IOLs. A future application will be the use of ORange for intraoperative aphakic IOL power calculations. In particular, the system is also showing value for use on post-LASIK eyes – often one of the greatest challenges in IOL calculations.
Read the full release here.
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