Evaluation of the imaging quality of aspheric and Toric intraocular lense designed with different spherical designs using the model eyes
GUO Congrong
LUO Jingna
HAN Zhimin
Abstract：Objective To evaluate the effect of eccentricity on imagine quality by an optimal simulation research of intraocular lense(IOL)with different spherical designs of CT LUCIA 601 in model eyes,and to assess the imagine quality of Toric IOL by establishing an eye model with corneal astigmatism.Methods The Hwey-Lan Liou model eyes were established using Zemax optical software to simulate the pupil diameter of 3 mm and 5 mm.The modulation transfer function(MTF)of non-ellipsoidal IOL,fully-corrected IOL,zero-spherical IOL and spherical IOL were calculated,where all mentioned IOL were centered and eccentric 0.25mm,0.5mm and 0.75mm in the eye model.The corneal astigmatism model was established using the Hwey-Lan Liou model eyes with Zemax optical software.The image quality of Toric IOL under polychromatic light environment was analyzed by computer simulation when pupil diameter was 3mm and 5mm,respectively.Results Good optical performances were obtained equally in the four types of IOL in 3mm pupil when IOL was aligned with low and high spatial frequencies of MTF.In the decentration of 0.25mm,0.5mm and 0.75mm,MTF in the four types of IOLs consistently decreased.Fully-corrected spherical aberration of IOL showed the lowest MTF,while non-ellipsoid IOL and spherical IOL presented the best MTF.In aligned IOL with pupil diameter of 5mm,fully-corrected spherical aberration of IOL showed better MTF than other IOL.Non-elliposoid IOL showed better MTF in most of the spatial frequencies.In the decentration of 0.25mm,fully-corrected spherical aberration of IOL still showed priority than the other three IOL.MTF of spherical IOL and IOL with zero spherical aberration were consistently lower than non-ellipsoid IOL in the context of 0.5mm decentration,of which non-ellipsoid IOL was prioritized.In the decentration of 0.75mm,MTF of non-ellipsoid IOL and spherical IOL were evenly better than the other two IOLs.MTF results showed that T3 and T5 were basically the same at 3mm pupil diameter,but slightly lower than spherical IOL.MTF values of spherical IOL and T3,T5 were significantly lower at 5mm pupil diameter than at 3mm pupil diameter,although they were approached.Wavefront aberrations showed that when pupil diameter was 3mm,the coma aberration in spherical IOL and T3,T5 astigmatism aberration were 0,and spherical aberration was 0.085 and 0.098,0.084 respectively.When pupil diameter was 5mm,spherical IOL astigmatism was still 0,and T3,and T5 astigmatism showed-0.01 and 0.01 residual astigmatism,respectively.The spherical IOL and the spherical aberration of T3 and T5 were 0.684 and 0.682 and 0.675,respectively.Conclusion Hwey-Lan liou model eyes with Zemax optical design software can simulate IOL image quality under different conditions.The design of negative spherical aberration around CT LUCIA 601 IOL improves its anti-eccentricity.The astigmatism model eye established in this study can be used to evaluate the imaging quality of Toric IOL.
Keywords：eye modelintraocular lenses with different spherical designsToric IOLcataractimaging quality
Publication Date：2025-09-26
Online Publishing Date：2025-10-24(First online date of this platform, not the publication date of the document)
Pages：5( 1461-1465 )