EyeWorld is the official news magazine of the American Society of Cataract & Refractive Surgery.
Issue link: https://digital.eyeworld.org/i/1215009
22 | EYEWORLD | MARCH 2020 ASCRS NEWS groups, more eyes in the IC-8 group appeared to have a plano spherical equivalent postoper- ative refraction. This, and the hypothesis that the IC-8 small aperture design may enlarge the acceptable target refraction range, may con- tribute to the better distance acuity seen in the non-dominant, low myopia targeted eye in the IC-8 group compared to the Symfony group. Mesopic conditions for intermediate and near vision were not tested in this study. One might expect a potential decrease in visual acuity at intermediate and near distances with an IC-8 lens under dimmer illumination as the smaller aperture limits the amount of light en- tering the eye. Future study in this area may be particularly important when counseling patients who enjoy reading before bed or in other meso- pic conditions. Overall, both the Symfony and the IC-8 IOL platforms can provide extended visual range in patients after cataract surgery, with modestly superior distance vision in the IC-8 group. Binocularly, both designs provide com- parable intermediate and near vision. When applying study results to the patient in front Results from the study questionnaire sug- gested slightly higher satisfaction with distance vision among the IC-8 group and with near vision among the Symfony group; however, analysis of the subjective survey results were limited. Discussion This prospective study demonstrates that a mini-monovision refractive target with excellent binocular distance visual acuity can be reliably achieved with the IC-8 or Symfony platforms. This type of prospective trial is becoming even more essential as IOL technologies to address presbyopia advance and diversify. There are multiple possible reasons why the IC-8 group may have had slightly better dis- tance visual acuity. Compared to the monofocal IOL implanted in the dominant eye in the IC-8 group, the light splitting nature of multifocal lens design and relative intolerance to refractive error likely contributed to reduced distance acuity in the Symfony IOL group. While the average refractive outcome of the non-domi- nant eyes was not statistically different between continued from page 21 Casey Eye Institute, Oregon Health and Science University residents, from left: Nathan Lambert, MD, Kellyn Bellsmith, MD, Joseph Simonett, MD, Nathan Law, MD, and Caitlin Kakigi, MD