Rotational Stability of Monofocal and Trifocal Intraocular Toric Lenses With Identical Design and Material but Different Surface Treatment

Vandekerckhove, Kristof

doi:10.3928/1081597x-20171211-01

Cited by 39 publications

(48 citation statements)

References 28 publications

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“…During the first 3 months after surgery, several studies have mentioned that the toric IOL rotation can be attributed to an IOL surface with a low coefficient of friction [17], thinner optic of low-powered IOLs [10], the design of the IOL [18], an overall length of the IOL that is too small for the capsular bag [19] and instability of the anterior chamber [20].…”

Section: Discussionmentioning

confidence: 99%

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

Chen

et al. 2020

BMC Ophthalmol

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Background: A major focus of toric intraocular lens (IOL) implantation is the rotational stability, especially in the patients with long axial length (AL). In this study, we aimed to evaluate the clinical outcomes after implantation of TECNIS toric IOL in eyes with long AL and identify factors influencing their early-stage stability with preoperative corneal astigmatism. Methods: The study population consisted of 64 eyes from 52 cataract patients, and these patients had preoperative corneal astigmatism between 1.0 and 3.7 diopters (D) and underwent phacoemulsification and TECNIS toric IOL implantation. Ophthalmic biological measurements were carried out preoperatively, including AL, anterior chamber depth (ACD), lens thickness (LT), vitreous length (VL), anterior chamber volume (ACV), sulcus-to-sulcus (STS) and keratometric value (K). Clinical examinations, including visual acuity, manifest refraction, keratometry, digital anterior segment photographs with pupillary dilation, were performed at 1 and 3 months after surgery. Results: The mean best corrected distance visual acuity (BCDVA) was improved from 0.93 ± 0.35 logarithms of the minimal angle of resolution (logMAR) preoperatively to 0.07 ± 0.10 logMAR postoperatively at 3 months after surgery. The mean residual astigmatism (RAS) was 0.91 ± 0.74D at 3 months, which was significantly decreased compared with the preoperative corneal astigmatism of 1.71 ± 0.55 D. The mean absolute rotation of TECNIS toric IOL at 1 and 3 months was 7.42 ± 11.32 degree (°) (0-79°) and 7.48 ± 11.19°(0-79°), respectively. The mean area of capsulorhexis and the overlapped area between capsulorhexis and IOL optic intraoperatively was 21.04 ± 3.30 mm 2 and 7.40 ± 2.87 mm 2 .A positive correlation was found between IOL rotation and the area of capsulorhexis (p = 0.017) at 3 months after surgery. No correlation was found between IOL rotation and AL (p = 0.876), ACD (p = 0.387), LT (p = 0.523), VL (p = 0.546), ACV (p = 0.480), STS (p = 0.884), K1 (p = 0.429), K2 (p = 0.644), average of K1 and K2 (p = 0.520), intraoperative IOL axial direction (p = 0.396), preoperative corneal astigmatism (p = 0.269) or the overlapped area between capsulorhexis and IOL optic intraoperatively (p = 0.131). Conclusions: The large CCC was a risk factor for toric IOL rotation. An appropriately smaller sized CCC was conducive to increase the rotational stability of TECNIS toric IOL implantation in cataract cases with long AL.

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Section: Discussionmentioning

confidence: 99%

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

Chen

et al. 2020

BMC Ophthalmol

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“…IOL and iris were randomly misaligned. The (pseudo-random) magnitude of misalignment was drawn from Gaussian distributions with the following width ( σ ):Lateral IOL decentration relative to the videokeratometry axis (Δ r ): 0.3 mm 21 ,Axial IOL displacement (Δ z ): 0.3 mm 50,51 ,IOL tilt (rotation around an axis in the x / y -plane: ): 2.6° 21 ,IOL rotation around the z -axis (Δ α z ): 7° 52,53 ,Axial distance between the center of the IOL and the center of IOL tilt (Δ Rot ): 2.0 mm,Iris decentration relative to the videokeratometry axis (Δ r iris ): 0.2 mm 10 .…”

Section: Methodsmentioning

confidence: 99%

Keratoconic eyes with stable corneal tomography could benefit more from custom intraocular lens design than normal eyes

Schröder

Eppig

Liu

et al. 2019

Sci Rep

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We investigated whether eyes with keratoconic corneal tomography pattern could benefit more from aberration correction with custom intraocular lenses (IOLs) than normal cataractous eyes despite the effect of misalignment on the correction of aberrations. Custom IOLs (cIOLs) were calculated for twelve normal and twelve keratoconic eyes using personalized numerical ray tracing models. The Stiles-Crawford weighted root-mean-square spot-size (wRMS) at the virtual fovea was evaluated for cIOLs and aberration-neutral IOLs (nIOLs) in a simulated clinical study with 500 virtual IOL implantations per eye and per IOL. IOL misalignment (decentration, tilt, rotation) and pupillary ectopia (4.5 mm iris aperture) were varied upon each virtual implantation. The nIOLs achieved average wRMS of 16.4 ± 4.3 μm for normal, and 92.7 ± 34.4 μm for keratoconic eyes (mean ± standard deviation). The cIOLs reduced the average wRMS to 10.3 ± 5.8 μm for normal, and 28.5 ± 18.6 μm for keratoconic eyes. The cIOLs produced smaller wRMS than nIOLs in most virtual implantations (86.7% for normal and 99.4% for keratoconic eyes). IOL misalignment resulted in larger wRMS variations in the keratoconus group than in the normal group. Custom freeform IOL-optics-design may become a promising option for the correction of advanced aberrations in eyes with non-progressive keratoconic corneal tomography pattern.

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Section: Discussionmentioning

confidence: 99%

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

Chen

et al. 2020

Preprint

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Background: A major focus of toric intraocular lens (IOL) implantation is the rotational stability, especially in the patients with long axial length (AL). In this study, we aimed to evaluate the clinical outcomes after implantation of TECNIS toric IOL in eyes with long AL and identify factors influencing their early-stage stability with preoperative corneal astigmatism.Methods: The study population consisted of 64 eyes from 52 cataract patients, and these patients had preoperative corneal astigmatism between 1.0 and 3.7 diopters (D) and underwent phacoemulsification and TECNIS toric IOL implantation. Ophthalmic biological measurements were carried out preoperatively, including AL, anterior chamber depth (ACD), lens thickness (LT), vitreous length (VL), anterior chamber volume (ACV), sulcus-to-sulcus (STS) and keratometric value (K). Clinical examinations, including visual acuity, manifest refraction, keratometry, digital anterior segment photographs with pupillary dilation, were performed at 1 and 3 months after surgery. Results: The mean best corrected distance visual acuity (BCDVA) was improved from 0.93±0.35 logarithms of the minimal angle of resolution (logMAR) preoperatively to 0.07±0.10 logMAR postoperatively at 3 months after surgery. The mean residual astigmatism (RAS) was 0.91±0.74D at 3 months, which was significantly decreased compared with the preoperative corneal astigmatism of 1.71±0.55 D. The mean absolute rotation of TECNIS toric IOL at 1 and 3 months was 7.42±11.32 degree (°) (0-79°) and 7.48±11.19°(0-79°), respectively. The mean area of capsulorhexis and the overlapped area between capsulorhexis and optic intraoperatively was 21.04±3.30 mm2 and 7.40±2.87 mm2.A positive correlation was found between IOL rotation and the area of capsulorhexis (p=0.017) at 3 months after surgery. No correlation was found between IOL rotation and AL (p=0.876), ACD (p=0.387), LT (p=0.523), VL (p=0.546), ACV (p=0.480), STS (p=0.884), K1 (p=0.429)，K2 (p=0.644), average of K1 and K2 (p=0.520), intraoperative IOL axial direction (p=0.396), preoperative corneal astigmatism (p=0.269) or the overlapped area between capsulorhexis and optic intraoperatively (p=0.131) .Conclusions: The large CCC was a risk factor for toric IOL rotation. An appropriately smaller sized CCC was conducive to increase the rotational stability of TECNIS toric IOL implantation in cataract cases with long AL.

show abstract

Rotational Stability of Monofocal and Trifocal Intraocular Toric Lenses With Identical Design and Material but Different Surface Treatment

Cited by 39 publications

References 28 publications

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

Keratoconic eyes with stable corneal tomography could benefit more from custom intraocular lens design than normal eyes

Early-stage clinical outcomes and rotational stability of TECNIS toric intraocular lens implantation in cataract cases with long axial length

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