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Laboratory science - Scientific reports
Evaluation of a new soft tipped injector for the implantation of foldable intraocular lenses
  1. Guy Kleinmann1,
  2. David J Apple2
  1. 1John A Moran Eye Center, Department of Ophthalmology and Visual Sciences, University of Utah, Salt Lake City, Utah, USA
  2. 2Laboratories for Ophthalmic Devices Research, John A Moran Eye Center, University of Utah, Salt Lake City, Utah, USA
  1. Correspondence to: Dr G Kleinmann John A Moran Eye Center, Department of Ophthalmology and Visual Sciences, University of Utah, 50 N Medical Drive, Salt Lake City, UT 84132, USA; guy.kleinmann{at}hsc.utah.edu

Abstract

Aim: To evaluate the R-INJ-04 soft-tipped injector, a new injector with an integral round nozzle manufactured by Rayner Intraocular Lenses, England.

Methods: 16 Rayner C-flex intraocular lenses (IOLs; Rayner Intraocular lenses, England) ranging between +10 and +30 D (2 for each power) were tested. An ophthalmic viscoelastic device (Healon, AMO, Santa Ana, California, USA) was applied to the injectors. The IOLs were loaded according to the company injector’s instructions for use and were injected into a Petri dish. After the injection, all the IOLs and nozzles were evaluated by gross (macroscopic) and microscopic analyses and photographed under a light microscope. One lens of each power and the cartridge used for the implantation were then sent for further analysis by scanning electron microscopy (SEM). The rest of the IOLs were tested for power and modulation transfer function (MTF).

Results: All the injections were successful. No damage to the IOLs or to the injectors was found by gross examination, light microscopy and SEM. No deposits were found on the IOL optical surfaces or haptics. Power and MTF analysis showed a close match with the original measurements.

Conclusion: Our results suggest that the R-INJ-04 soft-tipped injector is safe for the implantation of the C-flex IOL with power range from 10 to 30 D. No structural damage to the IOLs or to the injectors was found, and the lens power and light transmission properties were not damaged in any way by the injection process.

  • IOL, intraocular lens
  • MTF, modulation transfer function
  • OVD, ophthalmic viscoelastic device
  • SEM, scanning electron microscopy

https://doi.org/10.1136/bjo.2006.103192

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    Footnotes

    • Published Online First 29 November 2006

    • Funding: This study was supported in part by an unrestricted grant from Rayner Intraocular Lenses, England.

    • Competing interests: The authors have no financial or proprietary interest in any product mentioned in this paper. DJA is a consultant to Rayner Intraocular lenses, England.