June 2022
Volume 63, Issue 7
Open Access
ARVO Annual Meeting Abstract  |   June 2022
Estimation of structural integrity of Rayner RA0600C intraocular lens in a model of transscleral fixation with the Gore-Tex suture
Author Affiliations & Notes
  • Niharika Bhatia
    Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, United States
  • Ananya Gorrai
    Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, United States
  • Konstantin Astafurov
    Department of Ophthalmology, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, United States
  • Footnotes
    Commercial Relationships   Niharika Bhatia None; Ananya Gorrai None; Konstantin Astafurov None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2022, Vol.63, 3422 – F0322. doi:
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      Niharika Bhatia, Ananya Gorrai, Konstantin Astafurov; Estimation of structural integrity of Rayner RA0600C intraocular lens in a model of transscleral fixation with the Gore-Tex suture. Invest. Ophthalmol. Vis. Sci. 2022;63(7):3422 – F0322.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Sutured intraocular lens (IOL) fixation is used for fixating IOLs in the absence of capsular support. Various IOLs have been employed in the past for this including CZ70BD (Alcon Laboratories, Inc), Akreos AO60 and, most recently, enVista MX60 and MX60E (Bausch & Lomb, Inc). Some of these IOLs have substantial disadvantages, including fracture of IOL eyelets. The purpose of this study was to determine the maximal tensile strength of the eyelet in a newly FDA approved IOL RayOne RAO600C (Rayner, Inc) and compare it to the other commonly used IOLs.

Methods : We tested Rayner RAO600C and CZ70BD lenses. The IOLs were suspended in a testing platform with the optic held by a clamp and a simple pass GoreTex 8-0 suture passed through an eyelet. Gradually increasing downward force was applied to the GoreTex suture/eyelet by adding weight until the fracture of the eyelet was recorded. The resultant force applied to IOL eyelets was calculated. Statistical analysis to compare the mean tensile strength was completed by the two-tailed Mann Whitney U-test.

Results : The mean eyelet fracture force was 0.2609 N ± 0.0305 N for the CZ70BD (n=4) and 1.002 N ± 0.0878 N for the RAO600C IOL (n=4), which was statistically significantly greater (p=0.02857; Mann Whitney U-test). The absolute mean difference was 0.741 N (95% [0.6252, 0.8947]).

Conclusions : The eyelet-haptic complex of Rayner RAO600C lens endured significantly greater (3.8 times) tensile force than that of the CZ70BD. In a prior similar investigation, CZ70BD fractured at a greater force than we observed, which may be related to differences in experimental set-up. Further, in this prior study, CZ70BD had the same tensile strength when compared to Envista MX60E, and 2.3 times lower tensile strength when compared to Akreos AO60 IOL. Extrapolating those results to our data, RAO600C eyelet-haptic complex is potentially significantly stronger than Envista MX60E and may be as strong as Akreos AO60. It also has advantages of being a foldable IOL and could be passed through a small 2.2mm corneal incision. Overall, our findings suggest that the RAO600C may be a sustainable option for transscleral sutured IOL fixation.

This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.

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