Multifocal IOL implant with or without capsular tension ring: study of wavefront error and visual performance

Area of Science:

• Ophthalmology
• Optical Engineering
• Biomedical Engineering

Background:

• Multifocal intraocular lenses (MIOLs) aim to restore vision at multiple distances.
• Capsular tension rings (CTRs) are used to stabilize intraocular lenses (IOLs).
• Understanding the impact of CTRs on MIOL performance is crucial for optimizing visual outcomes.

Purpose of the Study:

• To compare visual performance and wavefront error after multifocal intraocular lens (MIOL) implantation with or without a capsular tension ring (CTR).

Main Methods:

• Sixty eyes received either an AcrySof ReSTOR SN60D3 MIOL with a Corneal ACPI 11 CTR (Group 1) or the MIOL alone (Group 2).
• Visual acuity (high/low contrast) and wavefront aberrations were assessed at 20 days and 360 days post-surgery.
• IOL decentration and tilt were also measured.

Main Results:

• No significant difference in visual acuity between groups.
• Group 1 showed significantly lower root mean square (RMS) of ocular and internal wavefront error, including high-order aberrations, trefoil, and coma.
• Higher IOL decentration and tilt were observed in Group 1.

Conclusions:

• ReSTOR MIOL effectively improves visual performance and quality of vision.
• Capsular tension ring (CTR) implantation significantly reduces ocular wavefront error by improving IOL position and minimizing aberrations.