OCT biometry
SS-OCT more accurate and informative than older optical biometry technologies


Roibeard O’hEineachain
Published: Thursday, May 18, 2017

OCT technology is definitely the future for ocular biometryINTRAOPERATIVE BIOMETRY However, even the best preoperative measurements can provide only an estimation of the position of the implanted IOL. That is because the combination of accurate axial length, anterior chamber depth and lens thickness values still leave uncertainty regarding the equatorial plane of the empty capsule and therefore the haptic plane of the implanted lens. Yet once again, OCT may provide a partial solution, thanks to the relative ease with which it can be employed intraoperatively. He noted that he and his associates have been working with a prototype set-up for intraoperative measurements using a Visante anterior segment OCT combined with a surgical microscope. So far, in a study involving 164 patients, they have found that had they used the intraoperative OCT anterior chamber depth measurements as the haptic plane in their IOL calculation they would have had a better refractive outcome than those achieved using preoperative measurements. “We still have the problem of shift of the lens during the first weeks after surgery but this is minor in most modern lenses. So the main problem with predicting the position of the lens is definitely improved,” he added. Nino Hirnschall: nino.hirnschall@gmail.com
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