scholarly journals Comparative evaluation of rotational stability of toric IOLs with four-eyelet vs two-eyelet capsular tension rings in eyes with high myopia

2021 ◽  
Vol 14 (3) ◽  
pp. 378-382
Author(s):  
Hui-Min Jiang ◽  
◽  
Li-Ming Tao ◽  
Keyword(s):  
Visual Acuity ◽  
High Myopia ◽  
Visual Outcome ◽  
Corneal Astigmatism ◽  
Rotational Stability ◽  
Toric Iol ◽  
Toric Iols ◽  
Group A ◽  
The Mean ◽  
Group B

AIM: To compare the rotational stability of Toric intraocular lens (IOLs) implantation combined with four-eyelet or two-eyelet capsular tension rings (CTRs) in eyes with high myopia and cataract. METHODS: This prospective randomized controlled interventional study included 33 eyes which had preoperative corneal astigmatism ≥1.5 D and ocular axial length ≥25.5 mm. These eyes were randomly divided into two groups to undergo phacoemulsification and toric IOL implantation with either four-eyelet CTR implantation (group A, n=16) or two-eyelet CTR implantation (group B, n=17). Uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), phoropter examination results, and toric IOL rotation degrees were tested 6mo after the surgery. RESULTS: In both groups, the toric IOL was in the capsular sac 6mo after surgery. The difference between the two groups in terms of visual outcome was not found to be statistically significant (P>0.05) at a follow-up of 6mo. The mean residual astigmatism values were 0.56±0.22 D and 0.92±0.24 D in A and B groups, respectively (P<0.001). The mean rotation degree of IOL was 1.00°±0.73° in group A and 3.53°±1.46° in group B (P<0.001). CONCLUSION: In cataract patients with high myopia and astigmatism, four-eyelet CTR can effectively increase the rotation stability of toric IOLs, achieving the desired goal of correcting corneal astigmatism.

scholarly journals Krypton yellow laser for the treatment of macular hole in high myopia without retinal detachment

2008 ◽  
Vol 31 (6) ◽  
pp. 357
Author(s):  
Ji-Ping Cai ◽  
Jin-Wei Cheng ◽  
Xiao-Ye Ma ◽  
Yu-Zhen Li ◽  
You Li ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Retinal Detachment ◽  
Macular Hole ◽  
High Myopia ◽  
Vitamin B1 ◽  
Macular Holes ◽  
Yellow Laser ◽  
Group A ◽  
The Mean ◽  
Group B

Purpose To evaluate the prophylactic effect of krypton yellow laser for the treatment of macular holes in high myopic eyes in order to reduce the risk of retinal detachment. Methods Twenty-seven eyes of 27 patients with high myopia and macular holes were randomly assigned to two groups. Fifteen patients (group A, 15 eyes) were subject to laser photocoagulation around the hole margin along with an oral placebo (vitamin B1), while 12 patients (group B, 12 eyes) were only given the oral placebo (vitamin B1). The incident rate of retinal detachment due to macular hole and the mean best-corrected visual acuity of the two groups before and after treatment were measured. The data were statistically tested by X2 test and Student’s t test. Results The incident rates of retina1 detachment in group A and group B were 20%(3/15) and 58.3%(7/12), respectively (X2=4.201, P0.05). The mean BCVA of group B on the initial examination was 24/200, while the mean BCVA at the final follow-up was 30/200 (P>0.05). No significant difference in initial visual acuity (P>0.05) or final visual acuity (P>0.05) was found between the two groups. Conclusion Krypton yellow laser photocoagulation could reduce the incidence of retinal detachment due to a macular hole in high myopia with acceptable functional results in this study.

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.

scholarly journals Prophylactic corneal cross-linking in LASIK surgery: effects on visual outcome and recovery time

2020 ◽  
Vol 17 (1) ◽  
pp. 61-68
Author(s):  
Dominique Clare Oh ◽  
Yiong Huak Chan ◽  
Sao Bing Lee ◽  
Jovina Li Shuen See
Keyword(s):  
Visual Acuity ◽  
Side Effects ◽  
Recovery Time ◽  
Visual Outcome ◽  
Cross Linking ◽  
Safe Procedure ◽  
Distance Visual Acuity ◽  
Visual Outcomes ◽  
Group A ◽  
Group B

Introduction: Collagen cross-linking is a useful adjunct in preventing corneal ectasia after laser-assisted in situ keratomileusis (LASIK). This study aimed to evaluate whether prophylactic cross-linking in IntraLase LASIK affects optimum visual outcome and recovery time in the immediate post-surgery period and is associated with any side effects. Methods: This was a retrospective case study on the right eyes of 100 Chinese subjects aged 18 to 40 years who underwent IntraLase LASIK. Fifty subjects who underwentcross-linking after completing LASIK (Group A) were compared with 50 subjects who did not undergo LASIK (Group B). Cases were evaluated for pre- and post-operative spherical equivalent, uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA), recovery time and presence of side effects. Results: At 1 week post-LASIK, mean (SD) UDVA of Group A subjects was poorer than Group B, at 1.05 (0.19) vs 1.17 (0.19) (p = 0.036); however, there was no significant difference in CDVA (p = 0.095). By 1 month post-LASIK, differences in both UDVA and CDVA were insignificant (p = 0.055, 0.106, respectively). Mean recovery time was 2.72 (95% confidence interval [CI] = 0.64-4.7) days longer in Group A (p = 0.010), although by 1 month post-LASIK, both groups were able to achieve CDVA equal to or better than that achieved pre-LASIK. Incidence of mild inflammation and dry eyes post-LASIK was similar in both groups (p = 1.00, 0.749, respectively); no other complications were observed. Conclusion: No differences in visual outcomes at and occurrence of side effects at 1 month post-LASIK were observed between subjects who underwent cross-linking prior to refractive surgery and those who did not. However, the group that underwent cross-linking had a slightly longer mean recovery time. Our study supports prophylactic cross-linking as a safe procedure that does not affect immediate visual outcomes among the Chinese population when used in adjunct with LASIK surgery.

scholarly journals Evaluation of changes in choroidal thickness after implantable collamer lens surgery in high myopia patients with Graves’ Ophthalmopathy (inactive phase)

2020 ◽  
Author(s):  
Fanglin He ◽  
Yan Liu ◽  
Renbing Jia ◽  
Jing zhang
Keyword(s):  
Visual Acuity ◽  
High Myopia ◽  
Choroidal Thickness ◽  
Control Group ◽  
Safety Index ◽  
Implantable Collamer Lens ◽  
Graves Ophthalmopathy ◽  
Group A ◽  
Efficacy Index ◽  
Group B

Abstract Background To evaluate the safety and effectiveness of the Visian Implantable Collamer Lens (ICL) implantation in high myopic patients with inactive Graves’ ophthalmopathy (GO) by observing the changes of choroidal thickness (CT). Methods Eight patients (16 eyes) with high myopia accompanied with inactive GO were selected as the experimental group (group A) and 18 high myopic patients (36 eyes) without GO were selected as a control group (group B). The outcomes of uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BCVA), safety index, efficacy index, intraocular pressure (IOP), vault, corneal endothelial count, and choroidal thickness (CT) were observed. The values of CT were measured using swept-source optical coherence tomography (SS-OCT) scans. Results The UCVA and BCVA in all operated eyes were better than that before surgery. The postoperative safety index and efficacy index were 1.23 and 1.19 in the group A, respectively, and 1.26 and 1.21 in the group B, respectively. In both groups, foveal CT increased significantly in high myopic patients at 2 hours and at 3 months after surgery, compared to preoperative values. The same tendencies were observed in the inner nasal and outer nasal regions. Compared with patients without GO, the increase of CT was more obvious in GO patients, 2 hours postoperatively (P = 0.006) and 3 months postoperatively (P = 0.011). Conclusions The ICL implantation is safe and effective in high myopic patients with inactive GO. Subfoveal and nasal CT may be useful parameters for monitoring the activity of GO patients.

scholarly journals Small Incision Cataract Surgery (SICS) with Clear Corneal Incision and SICS with Scleral Incision – A Comparative Study

2014 ◽  
Vol 2 (1) ◽  
pp. 22-27
Author(s):  
Md Shafiqul Alam ◽  
Khaleda Nazneen Bari
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Visual Outcome ◽  
Small Incision Cataract Surgery ◽  
Corneal Incision ◽  
Clear Corneal Incision ◽  
Age Related ◽  
Postoperative Astigmatism ◽  
Group A ◽  
Group B

Background: Age related cataract is the leading cause of blindness and visual impairment throughout the world. With the advent of microsurgical facilities simple cataract extraction surgery has been replaced by small incision cataract surgery (SICS) with posterior chamber intra ocular lens implant, which can be done either with clear corneal incision or scleral incision. Objective: To compare the post operative visual outcome in these two procedures of cataract surgery. Materials and method: This comparative study was carried out in the department of Ophthalmology, Delta Medical College & Hospital, Dhaka, Bangladesh, during the period of January 2010 to December 2012. Total 60 subjects indicated for age related cataract surgery irrespective of sex with the age range of 40-80 years with predefined inclusion and exclusion criteria were enrolled in the study. Subjects were randomly and equally distributed in 2 groups; Group A for SICS with clear corneal incision and group B for SICS with scleral incision. Post operative visual out come was evaluated by determining visual acuity and astigmatism in different occasions and was compared between groups. Statistical analysis was done by SPSS for windows version12. Results: The highest age incidence (43.3%) was found between 61 to 70 years of age group. Among study subjects 40 were male and 20 were female. Preoperative visual acuity and astigmatism were evenly distributed between groups. Regarding postoperative unaided visual outcome, 6/12 or better visual acuity was found in 19.98% cases in group A and 39.6% cases in group B at 1st week. At 6th week 6/6 vision was found in 36.3% in Group A and 56.1% in Group B and 46.2% in group A and 66% in group B without and with correction respectively. With refractive correction, 6/6 vision was attained in 60% subjects of group A and 86.67% of group B at 8th week. Post operative visual acuity was statistically significant in all occasions. Postoperative astigmatism of >0.50D was in 82.5% subjects of group A and 52.8% subjects of group B at 1st week. At 6th week postoperative astigmatism of less than 1D was in 79.95% subjects of Group A and 83.34% subjects of Group B. About 20% subjects in Group A and only 3.3% in Group B showed astigmatism of more than 1D and these differences on both the occasions were statistically significant. Conclusion: The post operative visual outcome was better in SICS with scleral incision (group B) than in SICS with clear corneal incision (Group-A). DOI: http://dx.doi.org/10.3329/dmcj.v2i1.17793 Delta Med Col J. Jan 2014; 2(1): 22-27

MACULAR CHANGES AFTER CATARACT SURGERY: A PROSPECTIVE STUDY.

2019 ◽  
pp. 1-3
Author(s):  
Ritu Agarwal ◽  
Piyush Gupta*
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Visual Outcome ◽  
Macular Thickness ◽  
Small Incision Cataract Surgery ◽  
Corrected Visual Acuity ◽  
Group A ◽  
Group B ◽  
A Prospective Study ◽  
Final Visual Outcome

AIM: To evaluate and compare macular thickness changes after uneventful Phacoemulsification and Manual Small Incision Cataract Surgery in correlation with visual acuity. METHOD: Study was conducted on 250 cataract patients they were equally divided into Group A and Group B. Group A patients underwent Phacoemulsification and Group B underwent MSICS. In both groups macular thickness using OCTand Best Corrected Visual Acuity (BCVA) was recorded preoperatively and postoperatively at 1 day, 1, 3, 6 weeks, 3 and 6 months. Macular thickness changes were evaluated and compared with visual acuity. RESULTS: Macular thickness continued to increase from 1 week to 6 months postoperatively which was statistically significant. No correlation found between increased macular thickness and BCVA. CONCLUSION: Increase in macular thickness remained subclinical and there was no impact of increased macular thickness on the final visual outcome.

scholarly journals Toric Intraocular Lenses in Cataract Surgery

2011 ◽  
Vol 04 (01) ◽  
pp. 38
Author(s):  
Rosa Braga Mele ◽  
Keyword(s):  
Cataract Surgery ◽  
Contact Lenses ◽  
Treatment Options ◽  
Corneal Astigmatism ◽  
Intraocular Lenses ◽  
Rotational Stability ◽  
Toric Iol ◽  
Toric Iols ◽  
High Prevalence ◽  
Increasing Demand

Cylindrical deficits in patients with corneal astigmatism of 0.50 diopter (D) to 1.00D may influence visual acuity. Increasing age and cataract surgery are correlated with greater prevalence and extent of corneal astigmatism. Conventionally, spectacles and contact lenses have been used to improve or correct corneal astigmatism. However, increasing demand for freedom from spectacles for distance vision and high prevalence of pre-existing corneal astigmatism in cataract patients have forced cataract surgery for the correction of aphakia and pre-existing corneal astigmatism to become common practice. However, implantation of toric intraocular contact lenses (IOLs) into the eye during cataract surgery may be a more predictable, powerful, and stable way of correcting pre-operative corneal astigmatism and may provide an adjunct or alternative to spectacles or relaxing incisions. Early toric IOLs were associated with post-operative rotational stability, lens misalignment, and safety concerns. The use of the new AcrySof® IQ Toric IOL for the correction of aphakia and pre-existing corneal astigmatism has largely mitigated these concerns. In addition, the AcrySof® IQ Toric IOL may also replace other treatment options for correcting pre-existing corneal astigmatism in patients undergoing cataract surgery.

scholarly journals Comparison of the visual outcome between macula-on and macula-off rhegmatogenous retinal detachment based on the duration of macular detachment

2021 ◽  
Vol 6 (1) ◽  
pp. e000615
Author(s):  
Chang Sup Lee ◽  
Karl Shaver ◽  
Samuel Huisok Yun ◽  
Daniel Kim ◽  
Sijin Wen ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
Rhegmatogenous Retinal Detachment ◽  
Visual Outcome ◽  
Time Frame ◽  
Macular Detachment ◽  
Significant Difference ◽  
The Status ◽  
Group A ◽  
The Mean ◽  
Group B

ObjectiveTo compare the visual outcomes between macula-on and macula-off primary rhegmatogenous retinal detachment (RRD) based on the duration of macular detachment (DMD).Methods and AnalysisRetrospective study including 96 eyes with RRD (34 macula-on and 62 macula-off) repaired between June 2012 and March 2020. The final visual acuity (VA) was compared after the patients were divided by the status of the macula and their DMD.ResultsThe mean final VA of patients with macula-on RRD (group A) was logarithm of the minimum angle of resolution (logMAR) 0.04±0.07, which was not statistically different from that of individuals with macula-off RRD with DMD ≤3 days (group B; logMAR 0.05±0.06) (p=0.79). There were statistically significant differences in the final VA between group A and patients with macula-off RRD with DMD of 4–7 days (group C; logMAR 0.15±0.15) (p=0.017) as well as between group A and those with macula-off RRD with DMD ≥8 days (group D; logMAR 0.36±0.29) (p<0.001). There was no significant difference in the final VA between group B and C (p=0.33).ConclusionThe mean final VA of patients with macula-on RRD was comparable to that of the macula-off patients with DMD ≤3 days. Our findings suggest that if macula-on RRD could not be immediately repaired, a repair within 72 hours may result in similar outcomes, even if the macula detaches within that time frame. However, once the macula detaches, we do not observe statistically significant differences in outcome for repairs done within 7 days.

Sign in / Sign up

Export Citation Format

Share Document