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IOL calculation metric optimizes outcomes in long, short eyes
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NEW ORLEANS — A new IOL power calculation method using intraoperative aberrometry improved refractive outcomes in eyes with unusual axial lengths, according to a study presented here.
During Refractive Surgery Subspecialty Day preceding the American Academy of Ophthalmology meeting, Eric D. Donnenfeld, MD, OSN Cornea/External Disease Board Member, elucidated results obtained with the ORA intraoperative aberrometer (WaveTec Vision).
“We’ve gotten to the point where this has become an indispensable aid for me in the operating room in determining refractive outcomes and honing my refractive results,” Donnenfeld said.
The retrospective study included 119 short eyes and 189 long eyes implanted with an AcrySof SN60WF acrylic posterior chamber IOL (Alcon) and calculated with a conventional model.
A comparator group comprised 33 short eyes and 97 long eyes implanted with the same IOL and analyzed with the optimized calculation model.
Using the conventional model, 60% of short eyes and 79% of long eyes were within 0.5 D of emmetropia. Using the optimized model, 73% of short eyes were within 0.5 D of emmetropia. Outcomes in long eyes did not change significantly.
“Globally, we’re now getting emmetropia values of 0.5 D or less in 82%, which is certainly an extraordinarily good number and much better than what you generally see in the literature,” Donnenfeld said. Using WaveTec’s VerifEye system, 86% of eyes are within 0.5 D of emmetropia, he said.
Disclosure: Donnenfeld is a consultant for WaveTec Vision.