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    Image-guided system streamlines cataract surgery planning

    Technology results in low residual refractive cylinder, good accuracy to outcomes

     

    Primary, secondary outcomes

    At the 3-month evaluation, 62.1% and 82.8% of patients with the monofocal IOL implanted had a residual refractive cylinder of 0.50 D or less and 0.75 D or less, respectively.

    Of patients with the multifocal IOL implanted, 71% and 88% had a residual refractive cylinder of 0.50 D or less and 0.75 D or less, respectively.

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    In comparison, Dr. Slade said the results published by surgeons who manually use an advanced IOL power formula, calculate the surgically induced astigmatism, and perform meticulous ink-marking showed that 53.3% of a toric population achieved 0.50 D or less of residual refractive cylinder (Holland et al. Ophthalmology. 2010;117:2104-2111).

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    Regarding the secondary outcomes in the monofocal IOL group, 77% had a MRSE of 0.50 D or less and 97.7% were within 0.75 D or less accuracy.

    In the multifocal IOL group, the results indicated that 82% had a MRSE of 0.50 D or less and 94% were within 0.75 D or less accuracy.

    Exploratory efficacy outcomes

    At the 3-month evaluation of the monofocal IOL group, 62.1%, 86.2%, and 98.9%, respectively, had best-corrected distance visual acuity of 20/20 or better, 20/25 or better, and 20/30 or better.

    In the multifocal IOL group, the percentages were 62%, 92%, and 98% for the respective visual acuity levels.

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    Investigators concluded that the system is a valuable addition to surgical planning.

    Dr. Slade concluded that study results showed patients had low residual refractive cylinder and good accuracy to target and refractive outcomes when using the image-guided system for surgical planning on patients with different IOL platforms.

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