Comparison of Visual Performance Between Two Diffractive Trifocal Intraocular Lenses

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optics

Background:

• Comparison of visual outcomes between two diffractive trifocal intraocular lenses (IOLs): Bi-Flex Liberty 677MY and FineVision POD F.
• Evaluation of visual performance in patients undergoing cataract surgery with these advanced IOLs.

Purpose of the Study:

• To compare the visual outcomes, including visual acuity and defocus curves, of the Bi-Flex Liberty and FineVision POD F trifocal IOLs.
• To assess the efficacy of these IOLs in providing distance, intermediate, and near vision post-surgery.

Main Methods:

• Prospective study with 62 patients (31 per IOL group) and a 3-month follow-up.
• Measurements included subjective refraction, visual acuity, and defocus curves at baseline, 1 month, and 3 months.
• Both eyes were operated on and included in the statistical analysis.

Main Results:

• The Liberty IOL demonstrated statistically greater monocular visual acuity at -2.00 D and -2.50 D defocus compared to the FineVision IOL (p < 0.01).
• The FineVision IOL showed a statistically significant improvement in binocular visual acuity at -1.50 D defocus compared to the Liberty IOL (p = 0.01).
• Both IOLs achieved visual acuities better than 0.20 logMAR across a defocus range from distance to near (-3.50 D).

Conclusions:

• Both trifocal IOLs offer a wide range of visual acuity, but exhibit distinct performance characteristics at different defocus levels.
• The Bi-Flex Liberty IOL may offer an advantage in near vision, while the FineVision POD F IOL shows strength in intermediate vision.
• Further research is recommended to identify patient-specific ocular parameters that may predict optimal visual outcomes with each type of IOL.