Binocular function to increase visual outcome in patients implanted with a diffractive trifocal intraocular lens.

Area of Science:

• Ophthalmology
• Optometry
• Biomedical Engineering

Background:

• Evaluation of binocular visual outcomes after trifocal intraocular lens (IOL) implantation.
• Comparison of binocular vs. monocular visual acuity at various distances.

Purpose of the Study:

• To assess the binocular visual performance at near, intermediate, and distance.
• To compare binocular outcomes with monocular outcomes in patients with diffractive trifocal IOLs.

Main Methods:

• Study included 100 eyes from 50 patients undergoing bilateral refractive lens exchange or cataract surgery.
• Implantation of a diffractive trifocal intraocular lens (AT LISA tri 839MP).
• Preoperative and 3-month postoperative ophthalmological examinations including visual acuities (UDVA, CDVA, UIVA, UNVA) and manifest refraction.

Main Results:

• Significant improvements in uncorrected distance (UDVA), intermediate (UIVA), and near visual acuities (UNVA), and corrected distance visual acuity (CDVA).
• Statistically significant better binocular visual outcomes compared to monocular outcomes at all tested distances (p < 0.0001 for UIVA).
• Postoperative manifest refraction within ±0.50 D in 86% of patients.

Conclusions:

• Diffractive trifocal IOLs enhance near, intermediate, and distance vision compared to preoperative status.
• A statistically significant improvement in binocular visual function across all distances was observed.