New IOL Offers Individual Correction of Spherical Aberration
Implanting a custom monofocal aspheric intraocular lens (IOL) appears to reduce ocular spherical aberration, according to a prospective case series involving 86 eyes of 69 individuals.
Participants with cataracts were randomized to receive either the Invidua aberration-correcting IOL (n=57 eyes) or the Aspira aspheric aberration-free IOL (n=29 eyes). The lenses were otherwise identical. Invidua IOLs were designed according to preop calculation of the corneal spherical aberration (which was similar in both groups). Investigators looked at refraction, visual acuity, photopic and mesopic contrast sensitivities, defocus curve, corneal and ocular spherical aberration, and pupil size at 3 months. Among the results:
- Residual ocular spherical aberration was significantly lower in the Invidua group.
- Photopic and mesopic contrast sensitivities were significantly higher in this contingent.
- Monocular defocus curve and distance, as well as intermediate and near visual acuity, were similar in both groups.
Schrecker J, Langenbucher A, Seitz B, Epping T. First results with a new intraocular lens design for the individual correction of spherical aberration. J Cataract Refract Surg. 2018 Oct;44(10):1211-1219 doi: https://doi.org/10.1016/j.jcrs.2018.06.055.