Aim: To evaluate the R-INJ-04 Soft Tipped Injector, a new injector with an integral round nozzle manufactured by Rayner Intraocular Lenses Ltd., England.
Methods: Sixteen Rayner C-flex intraocular lenses (IOLs) (Rayner Intraocular lenses Ltd., England) ranging between +10.0 D to +30.0 D (2 for each power) were tested. Ophthalmic viscoelastic device (OVD) (Healon, AMO, Santa Ana, CA, 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 analysis and photographed under a light microscope. One lens of each power and the cartridge that was used for the implantation were then sent for further analysis by scanning electron microscope (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 and 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 very 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 intraocular lens with power ranged from +10.0 D to +30.0 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.