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Allon Barsam, Henry D. Perry, Eric D. Donnenfeld; Real Time Intraoperative Wavefront Aberrometry To Refine Outcomes In Patients With Long Or Short Axial Lengths Undergoing Cataract Surgery. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5699.
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To review the postoperative outcomes in eyes with long or short axial lengths using an intraoperative wavefront aberrometer to perform real-time IOL calculation following cataract removal.
IOL power calculations were performed using the ORange Intraoperative Wavefront Aberrometer (WaveTec Vision Systems, Aliso Viejo, CA) in eyes with axial length measuring greater than 26.00 mm or less than 22.00 mm. The mean absolute value of the prediction error (MAVPE) was calculated based on the predicted postoperative spherical equivalent according to the ORange calculation compared to the patient’s one month manifest refraction. The MAVPE was calculated for the combined groups and for each group separately. For comparison a back calculated MAVPE was ascertained based on what the outcome would have been if the IOL power had been chosen based on traditional IOL formulae.
34 eyes were included in the analysis. The MAVPE for; 1) the combined group was 0.45 D with a standard deviation of 0.32 D (N=34), 2) eyes measuring longer than 26.0 mm was 0.43 D with a standard deviation of 0.35 D (N=20), 3) eyes measuring less than 22.0 mm was 0.50 D with a standard deviation of 0.27 D (N=14). The back calculated MAVPE for;1) the combined group was 0.58 D with a standard deviation of 0.61 D, 2) eyes measuring longer than 26.0 mm was 0.54 D with a standard deviation of 0.72 D, 3) eyes measuring less than 22.0 mm was 0.64 D with a standard deviation of 0.42 D.
The use of the intraoperative wavefront aberrometer may substantially improve outcomes in eyes that have previously been difficult to obtain accurate IOL calculations for. The majority of patients achieved a final postoperative outcome close to the intended refractive target.
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