Visual Performance Of An Ultra-Low Cylinder Power (0.9D) Toric Intraocular Lens Compared To Non-Toric Intraocular Lens
Published 2023 - 41st Congress of the ESCRS
Reference: PO0264 | Type: Free paper | DOI: 10.82333/gc01-3692
Authors: Adam Muzychuk* 1 , Christoph Kranemann 2 , Peter Zakrzewski 3 , Wendy Xiong 4
1Surgery,University of Calgary,Calgary,Canada, 2University of Toronto,Toronto,Canada, 3Langley Memorial Hospital,Langley,Canada, 4Bausch+Lomb,Vaughan,Canada
Purpose
The enVista 0.9D is amongst the lowest power toric intraocular lenses (IOLs) available in Canada which offers the potential to further refine refractive results of cataract and refractive IOL surgery surgery. The purpose of this study is to evaluate the post-operative outcomes of eyes implanted with a ultra-low cylinder power toric IOL (enVista Toric 0.9D) vs non-toric IOL (enVista).
Setting
Multicenter, retrospective, controlled study.
Methods
Eyes that underwent enVista 0.9D toric or enVista non-toric IOL implant who qualified for a 0.9D toric lens on the basis of the Barrett Toric Calculator, with 4 or more weeks of postoperative data available were included. Patients with visually significant comorbidities (e.g. visually-significant dry eye, retinal pathology, etc.), toric IOL rotation >10 degrees, or postop BCDVA of less than 20/25 were excluded. Data collected includes topography, manifest refraction, UCDVA, BCDVA, IOL rotation and the presence of device related adverse events. The primary effectiveness endpoint is the mean reduction in cylindrical power of the eye.
Results
Preliminary analysis was conducted with 188 eyes implanted with enVista Toric 0.9D and 189 eyes implanted with enVista non-toric IOL between October 2018 and November 2022. The primary effectiveness endpoint was to compare the mean reduction in cylindrical power of the eye for the toric vs. the non-toric group. The reduction in cylindrical power was defined as the difference between the magnitudes of the pre-op cylinder and residual manifest refractive cylinder at the corneal plane. The mean reduction in cylinder (D) was 0.428 ± 0.448 for the enVista Toric 0.9D group and 0.068 ± 0.407 for the non-toric group (p<0.0001).
Conclusions
The enVista toric 0.9D lens achieved significantly greater post-op cylindrical correction compared to the non-toric lens for eyes that qualified for the 0.9D toric lens. Ultra-low power torics (<1D) are an effective method of reducing postoperative refractive cylinder, further refining outcomes of cataract and refractive IOL-based procedures.