scholarly journals Comparing prediction accuracy between total keratometry and conventional keratometry in cataract surgery with refractive multifocal intraocular lens implantation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ho Seok Chung ◽  
Jae Lim Chung ◽  
Young Jun Kim ◽  
Hun Lee ◽  
Jae Yong Kim ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Prediction Error ◽  
Prediction Accuracy ◽  
Absolute Error ◽  
Multifocal Intraocular Lens ◽  
Swept Source ◽  
Iol Implantation ◽  
Multifocal Iol ◽  
Refractive Outcomes

AbstractWe aimed to compare refractive outcomes between total keratometry using a swept-source optical biometer and conventional keratometry in cataract surgery with refractive multifocal intraocular lens (IOL) implantation. We included patients who underwent cataract surgery with refractive multifocal IOL implantation. The IOL power was calculated using conventional formulas (Haigis, SRK/T, Holladay 2, and Barrett Universal II) as well as a new formula (Barrett TK Universal II). The refractive mean error, mean absolute error, and median absolute error were compared, as were the proportions of eyes within ± 0.25 diopters (D), ± 0.50 D, and ± 1.00 D of prediction error. In total 543 eyes of 543 patients, the absolute prediction error of total keratometry was significantly higher than that of conventional keratometry using the SRK/T (P = 0.034) and Barrett Universal II (P = 0.003). The proportion of eyes within ± 0.50 D of the prediction error using the SRK/T and Barrett Universal II was also significantly higher when using conventional keratometry than total keratometry (P = 0.010 for SRK/T and P = 0.005 for Barrett Universal II). Prediction accuracy of conventional keratometry was higher than that of total keratometry in cataract surgery with refractive multifocal IOL implantation.

scholarly journals Intraocular lens power calculations in eyes with pseudoexfoliation syndrome

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aleksandra Wlaź ◽  
Agnieszka Kustra ◽  
Agnieszka Rozegnał-Madej ◽  
Tomasz Żarnowski
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Prediction Error ◽  
Absolute Error ◽  
Pseudoexfoliation Syndrome ◽  
Control Group ◽  
Refractive Outcomes ◽  
Iol Calculation ◽  
Lens Power ◽  
And Control

AbstractTo compare refractive outcomes after cataract surgery in pseudoexfoliation syndrome (PEX) and control eyes and to investigate the accuracy of 3 intraocular lens (IOL) calculation formulas in these eyes. In this prospective comparative study 42 eyes (PEX group) and 38 eyes (control group) of 80 patients were included. The follow-up was 3 months. The refractive prediction error (RPE), mean absolute error (MAE), median absolute error (MedAE) and the percentages of eyes within ± 0.25 D, ± 0.5 D, ± 1.0 D and ± 2.0 D of prediction error were calculated. Three IOL calculation formulas (SRK/T, Barrett Universal II and Hill-RBF) were evaluated. PEX produced statistically significantly higher mean absolute errors and lower percentages of eyes within ± 0.5 D than control eyes in all investigated IOL calculation formulas. There were no statistically significant differences in the median absolute errors between the 3 formulas in either PEX or control eyes. Refractive outcomes after cataract surgery are statistically significantly worse in PEX than in control eyes. All three IOL calculation formulas produced similar results in both PEX and control eyes.Trial registration: ClinicalTrials.gov registration number NCT04783909.

scholarly journals Accuracy of theoretical IOL formulas for Panoptix intraocular lens according to axial length

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ayoung Choi ◽  
Hyunggoo Kwon ◽  
Sohee Jeon
Keyword(s):  
Intraocular Lens ◽  
Axial Length ◽  
Mean Absolute Error ◽  
Visual Quality ◽  
Absolute Error ◽  
Fort Worth ◽  
Iol Implantation ◽  
Multifocal Iol ◽  
Study Results ◽  
Study Population

AbstractThe accuracy of intraocular lens (IOL) calculations is suboptimal for long or short eyes, which results in a low visual quality after multifocal IOL implantation. The purpose of the present study is to evaluate the accuracy of IOL formulas (Barrett Universal II, SRK/T, Holladay 1, Hoffer Q, and Haigis) for the Acrysof IQ Panoptix TFNT IOL (Alcon Laboratories, Inc, Fort Worth, Texas, United States) implantation based on the axial length (AXL) from a large cohort of 2018 cases and identify the factors that are associated with a high mean absolute error (MAE). The Barrett Universal II showed the lowest MAE in the normal AXL group (0.30 ± 0.23), whereas the Holladay 1 and Hoffer Q showed the lowest MAE in the short AXL group (0.32 ± 0.22 D and 0.32 ± 0.21 D, respectively). The Haigis showed the lowest MAE in the long AXL group (0.24 ± 0.19 D). The Barrett Universal II did not perform well in short AXL eyes with higher astigmatism (P = 0.013), wider white-to-white (WTW; P < 0.001), and shorter AXL (P = 0.016). Study results suggest that the Barrett Universal II performed best for the TFNT IOL in the overall study population, except for the eyes with short AXL, particularly when the eyes had higher astigmatism, wider WTW, and shorter AXL.

scholarly journals Correction of High Astigmatism after Penetrating Keratoplasty with Toric Multifocal Intraocular Lens Implantation

2017 ◽  
Vol 8 (2) ◽  
pp. 385-388 ◽  
Author(s):  
Raffaele Nuzzi ◽  
Francesca Monteu
Keyword(s):  
Intraocular Lens ◽  
Penetrating Keratoplasty ◽  
Multifocal Intraocular Lens ◽  
Iol Implantation ◽  
Multifocal Iol ◽  
Therapeutic Choice ◽  
Lens Implantation ◽  
Corneal Leukoma ◽  
Relaxing Incisions

After penetrating keratoplasty (PK), high astigmatism is often induced, being frequently about 4–6 dpt. According to the entity and typology of astigmatism, different methods of correction can be used. Selective suture removal, relaxing incisions, wedge resections, compression sutures, photorefractive keratectomy, and laser-assisted in situ keratomileusis can reduce corneal astigmatism and ametropia, but meanwhile they can cause a reduction in the corneal integrity and cause an over- or undercorrection. In case of moderate-to-high regular astigmatisms, the authors propose a toric multifocal intraocular lens (IOL) implantation to preserve the corneal integrity (especially in PK after herpetic corneal leukoma keratitis). We evaluated a 45-year-old patient who at the age of 30 was subjected to PK in his left eye due to corneal leukoma herpetic keratitis, which led to high astigmatism (7.50 dpt cyl. 5°). The patient was subjected to phacoemulsification and customized toric multifocal IOL implantation in his left eye. The correction of PK-induced residual astigmatism with a toric IOL implantation is an excellent choice but has to be evaluated in relation to patient age, corneal integrity, longevity graft, and surgical risk. It seems to be a well-tolerated therapeutic choice and with good results.

scholarly journals Multifocal Toric Intraocular Lenses

2017 ◽  
Vol 11 (01) ◽  
pp. 23
Author(s):  
Tiago Bravo Ferreira ◽  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Intraocular Lenses ◽  
Multifocal Intraocular Lens ◽  
Iol Implantation ◽  
Medical Optics ◽  
Toric Iols ◽  
Recent Developments ◽  
Correction Of Astigmatism

Meticulous correction of astigmatism during cataract surgery is mandatory in cases of multifocal intraocular lens (IOL) implantation. Toric multifocal IOLs allow predictable astigmatic correction during cataract surgery. In this editorial, we review our investigation on the Tecnis ZMT IOL (Abbott Medical Optics, CA, US) as well as other recent developments in multifocal toric IOLs.

scholarly journals Refractive Outcomes of Femtosecond Laser-assisted Cataract Surgery with Arcuate Keratotomy and Standard Phacoemulsification with Toric Intraocular Lens Implantation

2021 ◽  
Author(s):  
Meng-Yin Lin ◽  
Yun-Dun Shen ◽  
Hsin-Yuan Tan ◽  
I-Jong Wang ◽  
I-Chan Lin
Keyword(s):  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Postoperative Outcome ◽  
Intraocular Lens Implantation ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
Refractive Outcomes ◽  
Lens Implantation

Abstract Background: Both femtosecond laser-assisted arcuate keratotomy (FS-AK) and toric intraocular lens (IOL) implantation were effective in correction for eyes with corneal astigmatism. The objective of this study was to evaluate the postoperative refractive outcomes of patients receiving femtosecond laser-assisted cataract surgery (FLACS) with FS-AK and patients receiving standard phacoemulsification with toric intraocular lens implantation Methods: This retrospective study reviewed the postoperative outcome of patients undergoing FLACS with FS-AK (FS-AK group) and patients undergoing standard phacoemulsification with toric IOL implantation (toric IOL group). The main outcome measures were bare and corrected visual acuities, keratometric and refractive astigmatism, and vector analysis.Results: The FL-AK group included 41 eyes with preoperative keratometric astigmatism of −1.64 diopters (D) ± 0.42 (standard deviation), and the toric IOL group included 53 eyes with preoperative keratometric astigmatism of −2.29 ± 0.91 D (P < 0.001). Postoperative refractive astigmatism was comparable between the two groups. Postoperative bare vision was significantly better (P = 0.005) and corrected visual acuity was marginally better in the toric IOL group than in the FS-AK group (P = 0.051). The absolute angles of error were 9.95 ± 9.57 degrees and 5.08 ± 4.94 degrees (P = 0.02) in the FS-AK and toric IOL groups, respectively.Conclusion: Both FLACS with FS-AK and standard phacoemulsification with toric IOL implantation represent safe and effective methods for astigmatism correction at the time of cataract surgery. Standard phacoemulsification with toric IOL implantation achieves better visual outcome than combined FLACS and FS-AK at 6-month follow up.

Visual Outcomes Following Diffractive-Refractive Multifocal Intraocular Lens Implantation : Literature Review

2017 ◽  
Vol 43 (2) ◽  
pp. 112
Author(s):  
Yulinda Arty Laksmita ◽  
Tjahjono D Gondhowiardjo
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Multifocal Intraocular Lens ◽  
Multiple Sources ◽  
Iol Implantation ◽  
Multifocal Iol ◽  
Intermediate Vision ◽  
Visual Phenomenon ◽  
Near Visual Acuity ◽  
The Cost

Purpose: To evaluate the result of diffractive-refractive multifocal intraocular lens (IOL) implantation, regarding the visual acuity, spectacle independency, and also related disturbing visual pnenomenon such as halo and glare. Methods: Seventeen articles collected from multiple sources including Pubmed, Clinical Key, and Ophthalmology Advance were reviewed. Visual acuity. Five types of diffractive-refractive multifocal IOL were found including ReSTOR SA60D3, SN60D3, SA6AD3, SA6DA1, and AT Lisa 809M. Uncorrected and corrected visual acuity, spectacle independency and undesired visual phenomenon data of each IOL were analyzed. Results: For binocular uncorrected distance and intermediate vision, ReSTOR SN6AD1 is better than other IOL. Meanwhile, in binocular uncorrected near visual acuity category, ReSTOR SA60D3 is superior. Highest percentage of patients reporting spectacle independency found in ReSTOR SA60D3 group. Halo was found in each IOL group, ranged from 32 to 65 percent patients. Glare was found in a smaller percentage, ranged from 25 to 61 percent patients. Conclusion: The best option for patients aiming for best visual acuity in distance to intermediate activity without spectacle use is ReSTOR SN6AD1. Meanwhile, the best option for patients aiming for best near visual acuity is ReSTOR SA60D3. Comprehensive preoperative education is crucial, considering the cost and benefit aspects of multifocal IOL implantation.

Clinical and Self-Reported Outcomes after Multifocal Intraocular Lens Implantation of Patients with Stable Keratoconus

2021 ◽  
Author(s):  
Igor Šivec Trampuž ◽  
Kristina Mikek ◽  
Metka Krampf
Keyword(s):  
Visual Acuity ◽  
Patient Satisfaction ◽  
Intraocular Lens ◽  
Case Reports ◽  
Multifocal Intraocular Lens ◽  
Iol Implantation ◽  
Distance Visual Acuity ◽  
Refractive Outcomes ◽  
Uncorrected Distance Visual Acuity ◽  
Trifocal Iol

Abstract Background: Multifocal intraocular lens (IOL) implantation is generally not considered in patients with keratoconus; however, it may provide good optical results in selected patients with stage I and II keratoconus based on two case reports. Aims: To evaluate patient satisfaction and clinical outcomes in this patient population.Methods: This is a retrospective single-center, non-interventional, non-comparison study. All patients with frank keratoconus who had undergone a trifocal IOL implantation between 2016 and 2019 were invited to participate in this study (18 eyes of 9 patients). Postoperatively, refractive outcomes, contrast sensitivity, and ocular aberrations were recorded. A questionnaire was used for determining patient satisfaction and their quality of life. The mean follow-up time was 31.22 ± 6.38 months.Results: Postoperatively the patients’ uncorrected distance visual acuity improved from 1.13 ± 0.93 to 0.10 ± 0.17 (p˂0.001), corrected distance visual acuity went from 0.10 ± 0.11 to 0.05 ± 0.09 (p=0.19), mean refractive spherical equivalent changed from -4.34 ± 4.31 to 0.05 ± 0.51 D (p˂0.001), and manifest astigmatism from 2.44 ± 1.92 to 0.88 ± 1.81 D (p=0.017). A target refraction of less than ± 0.50 D was achieved in 17 eyes (94%) and one eye exhibited a hyperopic MRSE of +2.0 D. Three eyes (17%) lost 1 line of best corrected visual acuity and no patient lost two or more lines. The patients were independent of glasses in 78% for all distances. Conclusions: A trifocal IOL currently gives relatively good, predictable results with most patients feeling satisfied with the results of spectacle independence for all distances.

scholarly journals Prediction accuracy of standard and total keratometry by swept-source optical biometer for multifocal intraocular lens power calculation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hun Lee ◽  
Jae Lim Chung ◽  
Young Jun Kim ◽  
Jae Yong Kim ◽  
Hungwon Tchah
Keyword(s):  
Cataract Surgery ◽  
Case Series ◽  
Intraocular Lenses ◽  
Power Calculation ◽  
Neutral Position ◽  
Swept Source ◽  
Refractive Outcomes ◽  
Case Series Study ◽  
Significant Difference ◽  
Optical Biometer

AbstractWe aimed to compare the refractive outcomes of cataract surgery with diffractive multifocal intraocular lenses (IOLs) using standard keratometry (K) and total keratometry (TK). In this retrospective observational case series study, a total of 302 patients who underwent cataract surgery with multifocal IOL implantation were included. Predicted refractive outcomes were calculated based on the current standard formulas and a new formula developed for TK using K and TK, which were obtained from a swept-source optical biometer. At 2-month postoperatively, median absolute prediction errors (MedAEs) and proportion of eyes within ± 0.50 diopters (D) of predicted postoperative spherical equivalent (SE) refraction were analyzed. There was no significant difference between MedAEs or proportion of eyes within ± 0.50D of predicted refraction from K and TK in each formula. In TFNT00 and 839MP IOL cases, there was no difference between MedAEs from K and TK using any formula. In 829MP IOL cases, MedAE from TK was significantly larger than that from K in Barrett Universal II/Barrett TK Universal II (P = 0.033). In 677MY IOL cases, MedAE from TK was significantly larger than that from K in Haigis (P = 0.020) and Holladay 2 (P = 0.006) formulas. In the subgroup analysis for IOL, there was no difference between the proportion of eyes within ± 0.50 D of predicted refraction from K and TK using any formula. TFNT00 and 839MP IOLs were favorable with TK, with 677MY IOL with K and 829MP IOL being in a neutral position, which necessitates the study that investigates the accuracy of the new TK technology.

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