Prospective Visual Outcomes and Optical Performance of Gradient Refractive Index Multifocal IOL (Presented in Russian)
Narrative Responses:
Purpose
To evaluate distance, intermediate, near visual outcomes, contrast sensitivity, optical phenomena and spectacle independence in patients who received GRIN (gradient refraction index) multifocal intraocular lens (IOL).
Methods
Prospective study included 52 eyes (45 patients). IOL optical part is composed of one polymer with different refraction index. Power difference between components is 3.5 D. Intraocular lens has C-loop design with 2 haptic elements. Overall IOL diameter is 12.0 mm. Mean age of patients was 68 years (range, 52-78). We evaluated uncorrected and the best spectacle corrected visual acuity (VA) for far, near and intermediate distances, spherical equivalent (SE), contrast sensitivity (CS) and amplitude of pseudoaccommodation. Also we assessed quality of vision, glare, halos and the personal satisfaction of the patients.
Results
Three months after implantation mean uncorrected distance VA was 0.79, mean uncorrected near VA 0.68, mean uncorrected intermediate VA 0.57, mean corrected distance VA was 0.88, mean corrected near VA 0.78, mean corrected intermediate VA 0.67. SE was -0.31 D. Mean CS was 43.7. Mean amplitude of pseudoaccommodation was 4.51 D. 87% patients with multifocal gradient IOL did not need glasses for daily activities. Questionnaire revealed optical phenomena in postop in 4 eyes.
Conclusion
The study found high visual outcomes and optical performance after use of the GRIN multifocal lenses, high spectacle independence and low incidence of optical phenomena.