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Influence of intraocular lens tilt and decentration on wavefront aberrations
Futoshi Taketani1, Toyoaki Matuura, Eiichi Yukawa
1Department of Ophthalmology, Nara Medical University, Nara, Japan. ftaketan@naramed-u.ac.jp
Purpose:
To investigate the influence of intraocular lens (IOL) tilt and decentration on higher-order aberrations (HOAs) using wavefront analysis.
Setting:
Department of Ophthalmology, Nara Medical University, Nara, Japan.
Methods:
Forty eyes of 40 patients with a 5.5 mm optic, foldable acrylic IOL were examined 4 to 48 months postoperatively. Ocular wavefront aberrations of the central 4.0 mm aperture diameter were measured using a Hartmann-Shack aberrometer. Higher-order aberrations from the 3rd to 4th order were calculated using Zernike polynomials. The relationship between IOL tilt and decentration, measured with a Scheimpflug camera, and ocular HOAs were investigated.
Results:
The correlation between IOL tilt and coma-like aberrations was significant (r=0.431, Spearman rank correlation coefficient; P=.007). However, the correlation between IOL tilt and the spherical-like and total aberrations was not significant (P>.05), nor was the correlation between IOL decentration and coma-like, spherical-like, and total aberrations (P>.05).
Conclusions:
Intraocular lens tilt influenced ocular coma-like aberrations. The quality of the retinal image may improve by reducing IOL tilt.
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