What question did this study set out to answer?

The aim is to compare the stability, tilt, and decentration of intraocular lenses using two scleral fixation methods.

April 16, 2026Open Access

Long-Term Assessment of Intraocular Lens Stability, Tilt and Decentration Between Four-Point Scleral Fixation and Yamane Techniques

Key Points

The aim is to compare the stability, tilt, and decentration of intraocular lenses using two scleral fixation methods.
Compared two groups of eyes with different IOL fixation techniques: four-point and Yamane.
Evaluated IOL decentration and tilt at 30 days and 2 years post-surgery.
Analyzed correlations with previous pars plana vitrectomy, axial length, refractive error, astigmatism, and spherical equivalent.
Mean horizontal tilt in four-point fixation was 1.66° compared to 5.06° in Yamane technique (p < 0.05).
Mean vertical tilt at two years was 1.74° for four-point vs 3.09° for Yamane (p = 0.02).
No significant difference in horizontal decentration between groups (0.35 mm vs 0.34 mm, p > 0.05).
No significant correlation between IOL tilt/decentration and previous vitrectomy.

Abstract

Background: To compare tilt and decentration results of two scleral fixation intraocular lens (IOL) methods of four-point scleral fixation (Akreos AO60) and the Yamane technique (AcrySof MA60AC). Methods: Two groups were compared in terms of IOL decentration and tilt at day 30 and 2 years after surgery. Correlations between IOL tilt and decentration and previous pars plana vitrectomy (PPV), axial length (AL), refractive error (RE), astigmatism, and spherical equivalent (SE) were also analyzed. Results: This study included 50 eyes from 47 patients: four-point fixation in 25 eyes (group 1) and Yamane technique in 25 eyes (group 2). The mean horizontal tilt was 1.66° ± 1.45° in group 1 and 5.06° ± 4.65° in group 2. The horizontal tilt value was significantly higher (p 0.05). The mean vertical IOL decentration in group 1 was 0.34 ± 0.33 mm and in group 2 it was 0.27 ± 0.20 mm respectively (p = 0.45). No statistically significant changes in tilt and decentration time were demonstrated in both groups (p > 0.05). There was no statistically significant correlation between IOL tilt and decentration and previous PPV in both groups. Conclusions: Both techniques provide good centration and stability IOL in aphakic eyes in the absence of capsular support.

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