Functional Intermediate Vision and Pupil-Dependent Optical Behavior After Implantation of a Segmented Refractive...

Area of Science:

• Ophthalmology
• Optical Engineering
• Vision Science

Background:

• Intraocular lenses (IOLs) are crucial for vision correction after cataract surgery.
• Multifocal IOLs aim to restore vision at multiple distances, but can induce optical aberrations.
• Segmented refractive multifocal IOLs (MIOLs) are designed for improved intermediate and near vision.

Purpose of the Study:

• To evaluate visual outcomes and optical characteristics of a segmented refractive MIOL (SBL-3).
• To assess pupil-dependent higher-order aberrations (HOAs) and their relationship with visual function.
• To compare the SBL-3 MIOL with a standard monofocal IOL.

Main Methods:

• Retrospective study of 88 eyes with SBL-3 MIOLs versus monofocal IOLs.
• Assessed visual acuity at distance, intermediate, and near.
• Measured intraocular HOAs under varying light conditions and pupil sizes; obtained defocus curves.

Main Results:

• SBL-3 MIOL group showed significantly better intermediate and near visual acuity.
• Distance visual acuity was comparable between groups.
• SBL-3 MIOLs exhibited increased, pupil-dependent HOAs (coma, trefoil) without compromising intermediate vision.

Conclusions:

• The segmented refractive MIOL effectively improves intermediate and near functional vision.
• Pupil size influences HOAs in SBL-3 MIOLs, but these aberrations do not necessarily impair intermediate visual acuity.
• Findings offer insights into the optical behavior of segmented refractive MIOLs.