Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Yao, Yunqian; Meng, Jiaqi; He, Wenwen; Zhang, Keke; Wei, Ling; Cheng, Kaiwen; Lu, Yi; Zhu, Xiangjia

doi:10.1097/j.jcrs.0000000000000653

Cited by 24 publications

(12 citation statements)

References 30 publications

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“…An Italian study of a small sample reported similar results, where no correlation was found between AT TORBI 709M toric IOL rotation and WTW distance among myopic eyes with a mean WTW distance of 11.84 mm. 1 However, in our study, the mean WTW distance was obviously smaller (11.62 mm), and the axial length range was larger (21.71 to 34.60 mm). Our previous study based on 39 986 Chinese cataractous eyes also suggested an obviously smaller WTW distance compared with that of Western populations.…”

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confidence: 74%

Reply: Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Yao

Meng²,

He³

et al. 2022

J Cataract Refract Surg

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Comment on: Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens The recent article by Yao et al. has caught our attention. 1 After publication of the article by Erb-Eigner et al., we conducted a correlation analysis study between the postoperative rotations of the AT TORBI 709M (CZM) intraocular lens (IOL) and preoperative biometric measurements, including whiteto-white (WTW) distance. 2 The results on 285 IOLs showed no correlation (Pearson's r < 0.03), which is in contradiction with the aforementioned article.The objective of this letter is not to contradict the results of the study by Yao et al. but rather to bring the results of several years of reflections on the stability of toric IOLs and the internal analyzes on our results.In addition, we analyzed a multifocal IOL (mIOL) vs a monofocal IOL with the same double C-loop design (FineVision Toric vs Ankoris, BVI). The mean postoperative rotations were 2.39 ± 2.35 degrees for the mIOL group (n = 148) and 6.64 ± 6.31 degrees for the monofocal group (n = 259). Morover, the significant rotations observed were lower for the mIOL group with a maximum at 13 degrees vs 37 degrees for the monofocal group. Less rotation was observed with the mIOL, likely due to its manufacturing process and the unpolished diffractive lens, as mentioned by Vandekerckhove. 3 Finally, since 2020 we have been using a new unpolished hydrophilic toric IOL (Lucidis 124MT, SAV-IOL) with an overall size of 12.4 mm and a great improvement in stability (Table 1).We understand the observations of Yao et al. and, particularly, that the current lack of technology to know the true size of the bag remains the main concern to increase the stability of the toric IOLs. Nevertheless, it seems that no biometric parameter can predict a potential rotation in the capsular bag, whereas an unpolished IOL of more than 12 mm can improve stability for the patient and the surgeon.

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confidence: 74%

Reply: Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Yao

Meng²,

He³

et al. 2022

J Cataract Refract Surg

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“…Rotation is affected by the start of the haptic curvature, the OHJ, haptic width, and angle of contact Fig. 18 CT 3-dimensional images of the IOLs in the wells between the haptic and capsular bag, with a wider angle of contact improving rotational stability of toric IOLs, but also by biometric characteristics, with more rotation in eyes with longer axial length and a larger white-to-white measurement [19,20].…”

Section: Discussionmentioning

confidence: 99%

Geometry of Acrylic, Hydrophobic IOLs and Changes in Haptic–Capsular Bag Relationship According to Compression and Different Well Diameters: A Bench Study Using Computed Tomography

Borkenstein

2022

Ophthalmol Ther

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Introduction: Characteristics of the haptics and optic-haptic junction (OHJ) of an intraocular lens (IOL) affect IOL position in the capsular bag, positional stability, and the development of posterior capsule opacification. Therefore, the haptics and OHJ have a role in determining initial and long-term visual outcomes after cataract surgery. Understanding differences in the haptics and OHJ of available IOLs and in the relationships between the haptics of each IOL and the capsular bag across a range of capsular bag sizes might inform selection of an IOL model for individuals. Purpose: To evaluate the geometry of five currently marketed, commonly used one-piece hydrophobic acrylic monofocal IOLs and changes in haptic-capsular bag relationships according to capsular bag size using a range of compression well diameters. Methods: AcrySof SN60WF, CT LUCIA 621PY, enVista MX60, TECNIS ZCB00, and Vivinex XY1 IOLs were scanned with computed tomography (CT) in a dry, uncompressed state for quantitative analyses of haptic and OHJ dimensions and qualitative assessment of

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“…Eyes at risk of the latter are large and often highly myopic. 60,61 It is assumed that the capsular bag is sufficiently large that poor contact of the IOL haptic with the equator of the capsular bag occurs and allows rotation. It can occur in smaller eyes but less commonly.…”

Section: Post-operative Assessment and Management Of Toric Iolsmentioning

confidence: 99%

“…The former can be avoided by good pre‐operative measurement and good surgical technique. Eyes at risk of the latter are large and often highly myopic 60,61 . It is assumed that the capsular bag is sufficiently large that poor contact of the IOL haptic with the equator of the capsular bag occurs and allows rotation.…”

Section: Post‐operative Assessment and Management Of Toric Iolsmentioning

confidence: 99%

Toric intraocular lenses: Evidence‐based use

Goggin

2022

Clinical Exper Ophthalmology

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Uncorrected refractive astigmatism degrades visual acuity. Spherical intraocular lenses (IOLs) leave astigmatic errors resident in the cornea manifest in refractive astigmatism. Toric IOLs, correcting for this corneal astigmatism, contribute to spectacle-free vision in the pseudophakic eye. This review provides information to assist surgeons in a rational choice of eyes suitable for toric IOL implantation, methods of IOL cylinder power calculation, surgical techniques for toric IOLs and management of complications. With appropriate application of this information, correction of visually detrimental astigmatism can be achieved routinely.

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Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Abstract: To evaluate the associations between anterior segment parameters and the rotational stability of a plate-haptic toric intraocular lens (IOL).

Cited by 24 publications

References 30 publications

Reply: Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Reply: Associations between anterior segment parameters and rotational stability of a plate-haptic toric intraocular lens

Geometry of Acrylic, Hydrophobic IOLs and Changes in Haptic–Capsular Bag Relationship According to Compression and Different Well Diameters: A Bench Study Using Computed Tomography

Toric intraocular lenses: Evidence‐based use

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