Influence of Angle κ and Higher-Order Aberrations on Visual Quality Employing Two Diffractive Trifocal IOLs

Area of Science:

• Ophthalmology
• Optics
• Biomedical Engineering

Background:

• Presbyopia-correcting intraocular lenses (IOLs) aim to restore clear vision at multiple distances.
• Angle kappa, the angle between the visual and pupillary axes, and higher-order aberrations (HOAs) can influence visual quality after IOL implantation.

Purpose of the Study:

• To investigate the association between angle kappa distance and higher-order aberrations (HOAs) with postoperative visual acuity.
• To compare visual performance between AT LISA tri 839MP and Acrysof IQ PanOptix trifocal IOLs.

Main Methods:

• A prospective, randomized, comparative study included 43 eyes undergoing trifocal IOL implantation (AT LISA tri 839MP or Acrysof IQ PanOptix).
• Angle kappa distance and HOAs were measured using the OPD-Scan III analyzer.
• Postoperative visual acuity (uncorrected distance, intermediate, and near) was assessed at six months.

Main Results:

• Both trifocal IOL groups demonstrated excellent uncorrected visual acuity at distance, intermediate, and near.
• No significant association was found between angle kappa distance and postoperative visual acuity for either IOL.
• Internal aberrations showed a significant inverse correlation with the Strehl ratio for both IOL types.

Conclusions:

• Angle kappa distance does not appear to be a significant predictor of visual acuity outcomes after implantation of these two trifocal IOLs.
• Both AT LISA tri 839MP and Acrysof IQ PanOptix IOLs offer effective visual rehabilitation for presbyopia.
• Higher-order aberrations significantly impact visual quality, as indicated by their correlation with the Strehl ratio.