The major influence of anterior and equatorial zonular fibres on the far-to-near accommodation revealed by a 3D pre-stressed model of the anterior eye

Pu, Yutian; Liu, Ziyuan; Ye, Lin; Xia, Yunxin; Chen, Xiaoyong; Wang, Kehao; Pierscionek, Barbara K.

doi:10.1016/j.cmpb.2023.107815

Cited by 2 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is highlighted by a computer simulation by Goldberg 2 of how the synchronized movements of the ciliary body and lens during accommodation, which led to a new theory of reciprocal zonular action 2 . Subsequent research examining the influence of zonular fibers on accommodation revealed that the anterior and equatorial zonules play significant roles in modulating the lens's optical power 3 . Specifically, it was observed that the anterior zonular fibers exert a negative effect, while the equatorial fibers contribute positively to the accommodation process.…”

Section: Introductionmentioning

confidence: 99%

The potential influence of the ligament of Wieger on the crystalline lens shape

Ghaderi,

Ní Dhubhghaill,

Tassignon

et al. 2024

Sci Rep

View full text Add to dashboard Cite

This research uses mathematical modelling to evaluate the influence of the ligament of Wieger on the crystalline lens shape at rest, and during accommodation. An axisymmetric model of the anterior segment, including the ligament of Wieger, was created using the finite element method. Different conditions including variations of stiffness and positions of the ligament, with and without the ligament, were tested to see how they affected lens curvature and optical power. Adding the ligament of Wieger to the simulation had a noticeable impact on the optical power of the lens, particularly on the posterior surface power and total power. Ligament stiffness and width significant influenced the accommodative range of the eye by − 0.95D and − 2.39D for ligaments with the same and 3× the stiffness of the capsular bag, respectively. Ligament width and inner diameter had negligible effects on lens thickness but did have significant effects on posterior surface power and accommodation. In this simulation, we found that the ligament of Wieger can significantly affect the lens shape, both at rest and during accommodation, and may need to be considered in lens models.

show abstract

Section: Introductionmentioning

confidence: 99%

The potential influence of the ligament of Wieger on the crystalline lens shape

Ghaderi,

Ní Dhubhghaill,

Tassignon

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

The Effect of the Zonular Fiber Angle of Insertion on Accommodation

Feng,

Pierscionek,

Weeber

et al. 2024

Vision

View full text Add to dashboard Cite

Purpose: With age, there is an anterior shift of the ciliary body in the eye, which alters the angle of zonular insertion in older eyes compared with younger eyes. This study aims to simulate lens accommodation with different zonular angles to consider the influence of zonular position on lens accommodative capacity. Methods: Models were constructed based on lenses aged 11, 29, and 45 years using a 2D axisymmetric structure that included a capsule, cortex, nucleus, and zonular fibers. The different zonular fibers were simulated by changing the position of the point where the zonular fibers connect to the ciliary body. The effect of the different zonular fiber insertion angles on the model shape and optical power was analyzed. Results: The models show that smaller angles made by zonular fibers to the surface of the lens lead to larger optical power changes with simulated stretching. When the models were stretched, and when varying the zonule angles, the optical power of the 11-, 29-, and 45-year-old models changed up to 0.17 D, 0.24 D, and 0.30 D, respectively. The effect of zonular angles on the anterior radius of curvature of the anterior surface varied by 0.29 mm, 0.23 mm, and 0.25 mm for the 11-, 29-, and 45-year-old models, respectively. Conclusions: Larger zonular fiber insertion angles cause smaller deformation and less accommodative change, while parallel zonules induce the largest change in lens shape.

show abstract

The major influence of anterior and equatorial zonular fibres on the far-to-near accommodation revealed by a 3D pre-stressed model of the anterior eye

Cited by 2 publications

References 50 publications

The potential influence of the ligament of Wieger on the crystalline lens shape

The potential influence of the ligament of Wieger on the crystalline lens shape

The Effect of the Zonular Fiber Angle of Insertion on Accommodation

Contact Info

Product

Resources

About