scholarly journals Rotational stability and clinical outcomes of a new one piece toric intraocular lens with anchor-wing haptics

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Iichiro Sugita ◽  
Tomoichiro Ogawa ◽  
Kazuo Ichikawa ◽  
Takahide Okita ◽  
Kazuno Negishi ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
University Hospital ◽  
Rotational Stability ◽  
Primary Analysis ◽  
Toric Intraocular Lens ◽  
Private Hospitals ◽  
Safety And Efficacy ◽  
Iol Implantation ◽  
Age Related ◽  
The Mean

Abstract Background To evaluate the safety and efficacy of a new toric intraocular lens (IOL) with anchor-wing haptics. Methods The new toric IOL with anchor-wing haptics (NS60YT, NIDEK Co., Ltd.) was implanted in eligible patients with age-related cataracts with preoperative corneal astigmatism of 1.0 D or greater at a university hospital and two private hospitals in Japan. The following IOL cylinder powers were evaluated: 1.50 D (NS60YT3), 2.25 D (NS60YT4), 3.00 D (NS60YT5) and 4.50 D (NS60YT7). All patients were assessed out to 12 months postoperatively. The primary endpoint was visual acuity (VA) with spherical addition at 6 months postoperatively, and the primary analysis calculated the proportion of eyes with VA with spherical addition of 0.1 logMAR or better. The magnitude of rotation was compared to the intended axis of IOL implantation at each postoperative examination. Adverse events were evaluated for the safety analysis. Results This study enrolled 64 eyes of 53 patients. At 6 months postoperatively, for all IOL powers, VA with spherical addition of 0.1 logMAR or better was achieved in 90% [95% confidence interval (CI): 80–96] of eyes. The mean IOL rotation was 5.3 ± 4.3° at 12 months postoperatively. The mean magnitude of rotation ranged from 1.9° to 2.5° between each postoperative examination from 1 day to 12 months. There were no vision-threatening intraoperative or postoperative complications for the duration of the study. Conclusions The NS60YT IOL remained stable after implantation and was efficacious for treating 1.00 D or greater astigmatism in patients with senile cataracts. Trial registration This study was registered at ClinicalTrials.gov (NCT03242486) on August 8, 2017 - Retrospectively registered.

scholarly journals Stability and clinical outcomes of a new one piece toric intraocular lens with anchor-wing haptics

2020 ◽  
Author(s):  
Iichiro Sugita ◽  
Tomoichiro Ogawa ◽  
Kazuo Ichikawa ◽  
Takahide Okita ◽  
Kazuno Negishi ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
University Hospital ◽  
Primary Analysis ◽  
Toric Intraocular Lens ◽  
Private Hospitals ◽  
Safety And Efficacy ◽  
Iol Implantation ◽  
Age Related ◽  
Uncorrected Visual Acuity ◽  
The Mean

Abstract Background: To evaluate the safety and efficacy of a new toric intraocular lens (IOL) with anchor-wing haptics.Methods: The new toric IOL with anchor-wing haptics (NS60YT, NIDEK Co., Ltd.) was implanted in eligible patients with age-related cataracts with preoperative corneal astigmatism of 1.0 D or greater at a university hospital and two private hospitals in Japan. The following IOL cylinder powers were evaluated: 1.50 D (NS60YT3), 2.25 D (NS60YT4), 3.00 D (NS60YT5) and 4.50 D (NS60YT7). All patients were assessed out to 12 months postoperatively. The primary endpoint was uncorrected visual acuity (UCVA) with spherical addition at 6 months postoperatively, and the primary analysis calculated the proportion of eyes with UCVA with spherical addition of 0.1 logMAR or better. The magnitude of rotation was compared to the intended axis of IOL implantation at each postoperative examination. Adverse events were evaluated for the safety analysis. Results: This study enrolled 64 eyes of 53 patients. At 6 months postoperatively, for all IOL powers, UCVA with spherical addition of 0.1 logMAR or better was achieved in 90% [95% confidence interval (CI): 80-96] of eyes. The mean IOL rotation was 5.3±4.3° at 12 months postoperatively. The mean magnitude of rotation ranged from 1.9° to 2.5° between each postoperative examination from 1 day to 12 months. There were no vision-threatening intraoperative or postoperative complications for the duration of the study.Conclusions: The NS60YT IOL remained stable after implantation and was efficacious for treating 1.00 D or greater astigmatism in patients with senile cataracts.Trial registration: This study was registered at ClinicalTrials.gov (NCT03242486) on August 8, 2017 - Retrospectively registered. (https://clinicaltrials.gov/ct2/show/NCT03242486)

Stability and Clinical Outcomes of A New One Piece Toric Intraocular Lens with Anchor-wing Haptics

2020 ◽  
Author(s):  
Iichiro Sugita ◽  
Tomoichiro Ogawa ◽  
Kazuo Ichikawa ◽  
Takahide Okita ◽  
Kazuno Negishi ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
University Hospital ◽  
Primary Analysis ◽  
Toric Intraocular Lens ◽  
Private Hospitals ◽  
Safety And Efficacy ◽  
Iol Implantation ◽  
Age Related ◽  
Uncorrected Visual Acuity ◽  
The Mean

Abstract Background: To evaluate the safety and efficacy of a new toric intraocular lens (IOL) with anchor-wing haptics.Methods: The new toric IOL with anchor-wing haptics (NS60YT, NIDEK Co., Ltd.) was implanted in eligible patients with age-related cataracts with preoperative corneal astigmatism of 1.0 D or greater at one university hospital and two private hospitals in Japan. Four cylinder powers of the IOL were evaluated as follows: 1.50 D (NS60YT3), 2.25 D (NS60YT4), 3.00 D (NS60YT5) and 4.50 D (NS60YT7). All patients were assessed out to 12 months postoperatively. The primary endpoint was uncorrected visual acuity (UCVA) with spherical addition 6 months postoperatively, and the primary analysis calculated the proportion of UCVA with spherical addition of 0.8 or better. The magnitude of rotation was compared to the intended axis of IOL implantation at each postoperative examination. Adverse events were evaluated for the safety analysis. Results: The study enrolled 64 eyes of 53 patients. At 6 months postoperatively, for all models, mean UCVA with spherical addition of 0.8 or better was achieved in 90% [95% confidence interval (CI): 80-96] of eyes. The mean IOL rotation was 5.3±4.3° 12 months after surgery. Between each postoperative examination from 1 day to 12 months, the mean magnitude of rotation ranged between 1.9° to 2.5°.There were no vision threatening intraoperative or postoperative complications for the duration of the study.Conclusions: The NS60YT IOL remained stable after implantation and was efficacious for treating 1.00 D or greater astigmatism in patients with senile cataracts.Trial registration: This study was registered at ClinicalTrials.gov (NCT03242486) on August 8, 2017 - Retrospectively registered. (https://clinicaltrials.gov/ct2/show/NCT03242486)

scholarly journals Clinical Evaluation of Toric Intraocular Lens Implantation Based on iTrace Wavefront Keratometric Astigmatism

2020 ◽  
Author(s):  
Zhe Zhang ◽  
Hui Li ◽  
Jing Zhou ◽  
Yaqin Zhang ◽  
Suhua Zhang
Keyword(s):  
Intraocular Lens ◽  
Case Series ◽  
Standard Technique ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Vector Method ◽  
Toric Iol ◽  
Iol Implantation ◽  
Wavefront Aberrometry ◽  
Prospective Case Series

Abstract Background: There was no standard technique for measuring corneal astigmatism. The iTrace wavefront aberrometry of cornea calculated steep power and axis based on the best Zernike mathematical fit from all topo data within 4 mm circle. It was supposed to be more accurate than iTrace simulated keratometry which was calculated based on only 4 points on the circle of 3 mm. This study evaluated visual outcomes, rotational stability after performing toric intraocular lens (IOL) implantation planning based on the wavefront aberrometry of the cornea with iTrace. Setting: Single site in China, Shanxi Eye Hospital, Shanxi, China.Design: Prospective case series.Methods: The study included 85 eyes of 63 patients undergoing phacoemulsification and toric IOL implantation. The IOL power and cylinders were chosen with the help of the iTrace toric planning program using wavefront keratometric astigmatism. Over a 3-month follow-up period, astigmatic changes were assessed using the Alpins vector method. Results: Preoperative mean corneal topographic astigmatism was 1.91 diopters (D) ± 0.69 (standard deviation). Postoperative mean refractive astigmatism decreased significantly to 0.48 D ± 0.34. Surgical induced astigmatism was 1.73 D ± 0.77 and the mean correction index was 0.89 ± 0.22, showing a slight undercorrection. The proportion of astigmatism ≤ 0.50 D increased from 0 to 71.8% postoperatively.Conclusions: This is the first study evaluating the clinical outcomes of using iTrace wavefront keratometric readings to plan a toric IOL implantation. The findings show that the iTrace built-in toric calculator with wavefront keratometric astigmatism for toric IOL planning is safe and effective.Trial registration: Current Controlled Trials ISRCTN94956424, Retrospectively registered (Date of registration: 05 February 2020). http://www.isrctn.com/ISRCTN94956424.

scholarly journals Clinical Evaluation of Toric Intraocular Lens Implantation Based on iTrace Wavefront Keratometric Astigmatism

2020 ◽  
Author(s):  
Zhe Zhang ◽  
Hui Li ◽  
Jing Zhou ◽  
Yaqin Zhang ◽  
Suhua Zhang
Keyword(s):  
Intraocular Lens ◽  
Case Series ◽  
Standard Technique ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Vector Method ◽  
Toric Iol ◽  
Iol Implantation ◽  
Wavefront Aberrometry ◽  
Prospective Case Series

Abstract Background: There was no standard technique for measuring corneal astigmatism. The iTrace wavefront aberrometry of cornea calculated steep power and axis based on the best Zernike mathematical fit from all topo data within 4 mm circle. It was supposed to be more accurate than iTrace simulated keratometry which was calculated based on only 4 points on the circle of 3 mm. This study evaluated visual outcomes, rotational stability after performing toric intraocular lens (IOL) implantation planning based on the wavefront aberrometry of the cornea with iTrace. Setting: Single site in China, Shanxi Eye Hospital, Shanxi, China. Design: Prospective case series. Methods ： The study included 85 eyes of 63 patients undergoing phacoemulsification and toric IOL implantation. The IOL power and cylinders were chosen with the help of the iTrace toric planning program using wavefront keratometric astigmatism. Over a 3-month follow-up period, astigmatic changes were assessed using the Alpins vector method. Results ： Preoperative mean corneal topographic astigmatism was 1.91 diopters (D) ± 0.69 (standard deviation). Postoperative mean refractive astigmatism decreased significantly to 0.48 D ± 0.34. Surgical induced astigmatism was 1.73 D ± 0.77 and the mean correction index was 0.89 ± 0.22, showing a slight undercorrection. The proportion of astigmatism ≤ 0.50 D increased from 0 to 71.8% postoperatively. Conclusions ： This is the first study evaluating the clinical outcomes of using iTrace wavefront keratometric readings to plan a toric IOL implantation. The findings show that the iTrace built-in toric calculator with wavefront keratometric astigmatism for toric IOL planning is safe and effective.

Subjective and objective clinical outcomes of a new trifocal toric intraocular lens and effect of femtosecond laser cataract surgery

2021 ◽  
pp. 112067212110464
Author(s):  
Oya Donmez ◽  
Bilgehan Sezgin Asena ◽  
Yonca Aydin Akova
Keyword(s):  
Visual Acuity ◽  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Clinical Outcomes ◽  
Intraocular Lens ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Low Contrast ◽  
Patient Reported ◽  
The Mean

Purpose: To evaluate the clinical outcomes and quality of life following implantation of PanOptix toric intraocular lens (IOL) and to compare the outcomes following femtosecond laser assisted cataract surgery (FLACS) and standard cataract surgery (SCS). Methods: This comparative retrospective study included 79 eyes of 55 patients underwent cataract or refractive lens exchange surgery between April 2017 and January 2020 in Bayindir Hospital and Kaskaloglu Eye Hospital. Corneal (CA) and refractive astigmatism (RA), uncorrected visual acuities for distant, intermediate, and near (UDVA, UIVA, and UNVA), low contrast distance visual acuity, rotational stability, defocus curves, photopic and mesopic contrast sensitivity (CS), visual function-14 (VF-14) test, presence of dysphotopsia, and need for spectacles were evaluated at postoperative third month. Outcomes were compared between FLACS and SCS group. Results: The mean UDVA, UIVA, and UNVA were 0.05 ± 0.07, 0.08 ± 0.08, and 0.06 ± 0.07 logMAR, respectively. All patients achieved ⩾0.3 logMAR uncorrected visual acuity for all distances. UDVA was found significantly better in FLACS group ( p = 0.03). All eyes had ⩽1 D of subjective postoperative RA. Defocus curve had two peaks at 0 and −1.50 D. Spectacle independence was achieved in 88.7% of patients. Photopic and mesopic CS was within normal range in all patients. The mean VF-14 score was 98 ± 2. The mean IOL axis rotation was 2.1° ± 2.3°. Only one patient reported seeing disturbing halos. Conclusions: This trifocal toric IOL effectively reduced refractive astigmatism and provided excellent visual outcomes with high spectacle independence, patients’ satisfaction, and good rotational stability. FLACS might have an impact on optimal postoperative results.

scholarly journals Clinical evaluation of toric intraocular lens implantation based on iTrace wavefront keratometric astigmatism

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Zhe Zhang ◽  
Hui Li ◽  
Jing Zhou ◽  
Yaqin Zhang ◽  
Suhua Zhang
Keyword(s):  
Intraocular Lens ◽  
Case Series ◽  
Standard Technique ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Vector Method ◽  
Toric Iol ◽  
Iol Implantation ◽  
Wavefront Aberrometry

Abstract Background Currently, there is no standard technique for determining corneal astigmatism. The iTrace wavefront aberrometry of cornea calculated steep power and axis based on the best Zernike mathematical fit from all topo data within 4 mm circle. It was supposed to be more accurate than iTrace simulated keratometry which was calculated based on only 4 points on the circle of 3 mm. This aim of this study was to evaluate visual outcomes and rotational stability after toric intraocular lens (IOL) implantation using the wavefront aberrometry of the cornea with iTrace. Setting: Single site in China, Shanxi Eye Hospital, Shanxi, China. Design: Prospective case series. Methods The study included 85 eyes of 63 patients undergoing phacoemulsification and toric IOL implantation. The IOL power and cylinders were chosen with the help of the iTrace toric planning program using wavefront keratometric astigmatism. Astigmatic changes were assessed using Alpins vector method over a 3-month follow-up period. Results Preoperative mean corneal topographic astigmatism was 1.91 diopters (D) ± 0.69 (standard deviation). Postoperative mean refractive astigmatism decreased significantly to 0.48 D ± 0.34. Surgical induced astigmatism was 1.73 D ± 0.77 and the mean correction index was 0.89 ± 0.22, showing a slight undercorrection. The proportion of astigmatism ≤0.50 D increased from 0 to 71.8% postoperatively. Conclusions This is the first study on evaluation of clinical outcomes of toric IOL implantation in corneal astigmatism patients using iTrace wavefront keratometric readings. The findings show that use of iTrace built-in toric calculator is safe and effective for planning toric IOL surgery for wavefront keratometric astigmatism. Trial registration Current Controlled Trials ISRCTN94956424, Retrospectively registered (Date of registration: 05 February 2020).

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

2019 ◽  
Author(s):  
Suhong He ◽  
Xiang Chen ◽  
Xingdi Wu ◽  
Yajuan Ma ◽  
Xuewen Yu ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Early Stage ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
Pearson's R ◽  
The Mean ◽  
Pearson’S R

Abstract Background: A major focus of toric intraocular lens (IOL) implantation is the rotational stability, especially in the patients with moderate to high myopia. In this study, we aimed to evaluate the clinical outcomes after implantation of TECNIS toric IOL in eyes with long axial length（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) and sulcus-to-sulcus (STS). The 1- and 3-month clinical outcomes included visual acuity, manifest refraction, keratometry, postoperative toric IOL axis, the area of capsulorhexis, and the overlapped area between IOL optic and anterior capsulorhexis. 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 7.41±11.32 degree (°) and 7.48±11.19° (0°-79°), respectively. A positive correlation was found between IOL rotation and the area of capsulorhexis (Pearson’s r=0.297, P=0.017) at 3 months after surgery. No correlation was found between IOL rotation and AL (Pearson’s r=-0.020, P=0.876), ACD (Pearson’s r=-0.123, P=0.387), LT (Pearson’s r=0.083, P=0.523), VL (Pearson’s r=-0.082, P=0.546), ACV (Pearson’s r=-0.094, P=0.480), STS (Pearson’s r=0.019, P=0.884), or the overlapped area between capsulorhexis and optic (Pearson’s r=-0.191, P=0.131) . Conclusions: The area of capsulorhexis was a risk factor for toric IOL rotation. Implantation of TECNIS toric IOL in cataract cases with long AL was effective and safe.

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

2019 ◽  
Author(s):  
Suhong He ◽  
Xiang Chen ◽  
Xingdi Wu ◽  
Yajuan Ma ◽  
Xuewen Yu ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Anterior Chamber ◽  
Axial Length ◽  
Early Stage ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
The Mean

Abstract 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.

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

2020 ◽  
Author(s):  
Suhong He ◽  
Xiang Chen ◽  
Xingdi Wu ◽  
Yajuan Ma ◽  
Xuewen Yu ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Anterior Chamber ◽  
Axial Length ◽  
Early Stage ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
The Mean

Abstract 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.

scholarly journals Rotational stability of modified toric intraocular lens

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0247844
Author(s):  
Ryoko Osawa ◽  
Tetsuro Oshika ◽  
Masahiko Sano ◽  
Takuma Yuguchi ◽  
Tadayoshi Kaiya
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
Toric Iols ◽  
Corrected Distance Visual Acuity ◽  
One Way Anova

We evaluated the rotational stability of a new toric intraocular lens (IOL), HOYA XY-1 toric IOL that is an improved version of HOYA 355 toric IOL, with longer overall length (13.0 mm vs. 12.5 mm), shortened unfolding time, and texture processing of the surface of haptics. Data from 193 eyes of 165 patients (76.4 ± 8.3 years old) with preoperative corneal astigmatism exceeding 0.75 diopters who had undergone phacoemulsification and toric IOL implantation were collected and analyzed. Corneal astigmatism, refractive astigmatism, and uncorrected (UDVA) and corrected distance visual acuity (CDVA) were evaluated before and 1 day, 1 week, and 1 month after surgery. The degree of IOL decentration, IOL tilt, and toric axis misalignment was assessed at 1 day and 1 month postoperatively. Fifty eyes received AcrySof toric IOL, 51 eyes TECNIS toric IOL, 46 eyes HOYA 355 toric IOL, and 46 eyes HOYA XY-1 toric IOL. The amount of axis misalignment from the intended axis was significantly different among IOLs (p = 0.004, one-way ANOVA), and HOYA XY-1 showed significantly less amount of axis misalignment than TECNIS (p = 0.020, Tukey’s multiple comparison) and HOYA 355 (p = 0.010). The proportion of eyes that showed axis misalignment <10° at 1 month postoperatively was significantly higher with HOYA XY-1 toric IOL than with other toric IOLs (χ2 test, p = 0.020). HOYA XY-1 toric IOL, the modified version of HOYA 355 toric IOL, showed excellent rotational stability in comparison with other models of toric IOLs.

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