Purpose:

To compare ray-tracing, Hartmann-Shack, autorefractor, and manifest refraction in patients implanted with echellete design intraocular lens (IOL) in combination with achromatic technology (SymfonyTM IOL, J&J Vision) and a monofocal IOL with negative spherical aberration (Tecnis ZCBOO, J&J Vision).

Methods:

Thirty-two eyes implanted with Symfony IOL and 24 eyes implanted with ZCBOO IOL (control group) were enrolled in this prospective study. Ray-tracing aberrometry (iTrace, Tracey Technologies Corp), Hartmann-Shack (LadarWave, Alcon labs.), autorefractor (Zeiss), and manifest refraction were performed 1-3 months postoperatively.

Results:

In the Symfony IOL group the mean manifest refraction spherical equivalent was -0.11±0.42D, the mean ray-tracing refraction spherical equivalent was -0.45±0.63D, the mean Hartmann-Shack refraction spherical equivalent was -0.84±0.39D, and the mean autorefraction spherical equivalent was -0.62±0.40D (p<0.001). no="" statistically="" significant="" differences="" were="" found="" in="" the="" control="" group="" (zcboo="" iol).="" higher-order="" aberration="" measurements="" with="" ray-tracing="" and="" hartmann-shack="" were="" similar="" in="" both="" groups.="" no="" statistically="" significant="" differences="" were="" found="" in="" the="" control="" group="" (zcboo="" iol).="" higher-order="" aberration="" measurements="" with="" ray-tracing="" and="" hartmann-shack="" were="" similar="" in="" both="">

Conclusions:

Manifest refraction techniques unique to echelette technology should be utilized to avoid over-minus end points. Autorefractors and aberrometers commonly use infrared light with chromatic aberration correction, thus we expect myopic results with echelette’s achromatic technology.