scholarly journals Comparison of Visual Performance between Refractive and Diffractive Multifocal Intraocular Lenses

2020 ◽  
Author(s):  
Lingying Ye ◽  
Tianyu Chen ◽  
Zhixiang Hu ◽  
Qiuwen Yang ◽  
Qiudong Su ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Optical Quality ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Interference Phenomenon ◽  
Distance Visual Acuity ◽  
Multifocal Intraocular Lenses ◽  
Significant Difference ◽  
Near Visual Acuity ◽  
Two Peaks

Abstract BACKGROUND: To compare the visual performance of asymmetric refractive multifocal intraocular lenses (MIOLs) with all optic zone diffractive MIOLs. METHODS: A prospective study. Patients underwent phacoemulsification were divided into two groups according to the type of MIOLs: 25 patients were implanted with asymmetric refractive MIOLs and 25 patients with all optic zone diffractive MIOLs. Visual acuity, refraction, defocus curves, objective optical quality and the questionnaire of life quality were measured 3 months after surgery. RESULTS: There was no significant difference between two groups in uncorrected distance visual acuity、uncorrected near visual acuity、best corrected distance visual acuity or distance corrected near visual acuity. However, the uncorrected intermediate visual acuity was 0.24±0.10 in refractive group and 0.31±0.13 in diffractive group (P<0.05); the distance corrected intermediate visual acuity was 0.22±0.09 in refractive group and 0.31±0.14 in diffractive group (P<0.05). Defocus curves showed two peaks of maximum vision in both groups. However, the curve between two peaks of refractive group was smoother than diffractive group. The Modulated transfer function cut-off frequency was （22.74±12.29）c/d in refractive group and（30.50±10.04）c/d in diffractive group (P<0.05); the OQAS values 100% (OV100%) were 0.75±0.41 in refractive group and 1.02±0.34 in diffractive group（P<0.05），OV20% were 0.52±0.34 in refractive group and 0.71±0.25 in diffractive group （P<0.05）.There was no significant difference between two groups at overall satisfaction, independence spectacles ratio or visual interference phenomenon. CONCLUSIONS: Both MIOLs achieve good visual acuity at distance and near. The asymmetric refractive MIOLs show better intermediate visual acuity, and the all optic zone diffractive MIOLs appear to have better objective visual quality.

scholarly journals Comparison of Visual Performance between Refractive and Diffractive Multifocal Intraocular Lenses

2019 ◽  
Author(s):  
Lingying Ye ◽  
Tianyu Chen ◽  
Zhixiang Hu ◽  
Qiudong Su ◽  
Jin Li
Keyword(s):  
Visual Acuity ◽  
Life Quality ◽  
Optical Quality ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Distance Visual Acuity ◽  
Multifocal Intraocular Lenses ◽  
Good Visual Acuity ◽  
Significant Difference ◽  
Near Visual Acuity

Abstract AIM To compare the visual performance of asymmetric refractive multifocal intraocular lenses (MIOLs) with all optic zone diffractive MIOLs.METHODS A prospective study. Patients underwent phacoemulsification were divided into two groups according to the type of MIOLs: 25 patients were implanted with asymmetric refractive MIOLs and 25 patients with all optic zone diffractive MIOLs. Visual acuity, refraction, defocus curves, objective optical quality and the questionnaire of life quality were measured 3 months after surgery.RESULTS There was no significant difference between two groups in uncorrected distance visual acuity、uncorrected near visual acuity、best corrected distance visual acuity or distance corrected near visual acuity. However, the uncorrected intermediate visual acuity was 0.24±0.10 in refractive group and 0.31±0.13 in diffractive group (P<0.05); the distance corrected intermediate visual acuity was 0.22±0.09 in refractive group and 0.31±0.14 in diffractive group (P<0.05). Defocus curves showed two crests in both groups. However, the curve between two crests of refractive group was smoother than diffractive group. The Modulated transfer function cut-off frequency was (22.74±12.29)c/d in refractive group and(30.50±10.04)c/d in diffractive group (P<0.05); the OQAS values 100% (OV100%) were 0.75±0.41 in refractive group and 1.02±0.34 in diffractive group(P<0.05),OV20% were 0.52±0.34 in refractive group and 0.71±0.25 in diffractive group (P<0.05).There was no significant difference between two groups at overall satisfaction, independence spectacles ratio or visual interference phenomenon.CONCLUSIONS Both MIOLs achieve good visual acuity at distance and near. The asymmetric refractive MIOLs show better intermediate visual acuity, and the all optic zone diffractive MIOLs appear to have better objective visual quality.

scholarly journals Comparison of visual performance between monofocal and multifocal intraocular lenses of the same material and basic design

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hirotaka Tanabe ◽  
Hitoshi Tabuchi ◽  
Tomohiro Shojo ◽  
Tomofusa Yamauchi ◽  
Kosuke Takase
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Wald Test ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Basic Design ◽  
Night Time ◽  
Multifocal Iol ◽  
Multifocal Intraocular Lenses ◽  
Near Visual Acuity

Abstract To compare the visual performance of a monofocal intraocular lens (IOL) (ZCB00) and a multifocal IOL (ZMB00) of the same material and basic design, we evaluated postoperative parameters at 10 weeks after the last surgery in cataract patients who underwent bilateral ZCB00 or ZMB00 implantation from December 13, 2010, to July 29, 2019, with the right and left lenses implanted within 3 months of each other. The study enrolled 2,230 eyes of 1,115 patients. The monofocal group comprised 904 eyes of 452 patients (72.3 ± 6.8 years; females/males, 268/184), and the multifocal group comprised 1,326 eyes of 663 patients (67.0 ± 7.8 years; females/males, 518/145). Contrast sensitivity (4.0/2.5/1.6/1.0/0.7 degrees), contrast sensitivity with glare (1.6/1.0/0.7 degrees), and the VFQ-25 score for driving at night were significantly better in the monofocal group (p < 0.00068, Wald test). Uncorrected intermediate/near visual acuity and near spectacle independence were significantly better in the multifocal group (p < 0.00068, Wald test). The two IOL groups had different characteristics in terms of contrast sensitivity, night-time driving, uncorrected intermediate/near visual acuity and near spectacle independence.

scholarly journals Visual quality after implantation of trifocal intraocular lenses in highly myopic eyes with different axial lengths

2021 ◽  
Vol 14 (3) ◽  
pp. 371-377
Author(s):  
Hui Liu ◽  
◽  
Hai-Jun Xia ◽  
Jin Zhou ◽  
◽  
...  
Keyword(s):  
Visual Acuity ◽  
Clinical Results ◽  
Quality Parameters ◽  
Optical Quality ◽  
Intraocular Lenses ◽  
Quality Analysis ◽  
Modulation Transfer ◽  
Distance Visual Acuity ◽  
Refractive Outcomes ◽  
Near Visual Acuity

AIM: To analyze postoperative clinical results after implantation of trifocal intraocular lenses (IOLs) in highly myopic eyes with different axial lengths (ALs). METHODS: This retrospective study describes 61 eyes of 44 patients that were implanted with trifocal diffractive IOLs (AT LISA tri 839MP). Twenty-one eyes (15 patients) were included in the AL<26 mm group, 19 eyes (13 patients) in the AL≥26 mm and <28 mm group, and 21 eyes (16 patients) in the AL≥28 mm group. Postoperative outcomes, including corrected and uncorrected distance visual acuity (UDVA), intermediate and near visual acuity at 167 cd/m2 luminance, depth of focus at 85 cd/m2 luminance, and objective optical quality parameters assessed using the Optical Quality Analysis System (OQAS), were compared among the groups at 3mo. RESULTS: There were no significant differences in the mean UDVA, uncorrected intermediate visual acuity, uncorrected near visual acuity, corrected distance visual acuity, distance-corrected intermediate visual acuity, and distance-corrected near visual acuity (DCNVA) among the three groups (P>0.05). Better near and intermediate visual acuity (from -1.5 D to -3.0 D) were noted on the defocus curve of the AL<26 mm group (P<0.01 vs AL≥28 mm group). Significantly higher objective scatter index (OSI) values and lower modulation transfer function (MTF) cut-off values, Strehl ratio (SR), and OQAS values (OVs) were observed in the AL≥28 mm group (P<0.01 vs AL<26 mm group). All OQAS parameters had statistically significant correlations with DCNVA and visual acuity at the vergence of -2.5 D (P<0.05 to P<0.01). CONCLUSION: Implantation of trifocal IOLs provides good short-term visual and refractive outcomes in highly myopic eyes with different ALs. However, the near vision decreases in the extremely myopic eyes at lower luminance, which is associated with the lower objective optical quality in these eyes.

scholarly journals Evaluation of Different Power of Near Addition in Two Different Multifocal Intraocular Lenses

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Ugur Unsal ◽  
Gonen Baser
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Intraocular Lenses ◽  
Near Vision ◽  
Distance Visual Acuity ◽  
Multifocal Intraocular Lenses ◽  
Uncorrected Distance Visual Acuity ◽  
Quality Of Vision ◽  
Corrected Distance Visual Acuity ◽  
Near Visual Acuity

Purpose.To compare near, intermediate, and distance vision and quality of vision, when refractive rotational multifocal intraocular lenses with 3.0 diopters or diffractive multifocal intraocular lenses with 2.5 diopters near addition are implanted.Methods.41 eyes of 41 patients in whom rotational +3.0 diopters near addition IOLs were implanted and 30 eyes of 30 patients in whom diffractive +2.5 diopters near addition IOLs were implanted after cataract surgery were reviewed. Uncorrected and corrected distance visual acuity, intermediate visual acuity, near visual acuity, and patient satisfaction were evaluated 6 months later.Results. The corrected and uncorrected distance visual acuity were the same between both groups (p=0.50andp=0.509, resp.). The uncorrected intermediate and corrected intermediate and near vision acuities were better in the +2.5 near vision added intraocular lens implanted group (p=0.049,p=0.005, andp=0.001, resp.) and the uncorrected near vision acuity was better in the +3.0 near vision added intraocular lens implanted group (p=0.001). The patient satisfactions of both groups were similar.Conclusion. The +2.5 diopters near addition could be a better choice in younger patients with more distance and intermediate visual requirements (driving, outdoor activities), whereas the + 3.0 diopters should be considered for patients with more near vision correction (reading).

scholarly journals Comparison of the visual performance of iris-fixated phakic lens and implantable collamer lens to correct high myopia

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiao-ling Jiao ◽  
Jun Li ◽  
Zhe Yu ◽  
Ping-hui Wei ◽  
Hui Song
Keyword(s):  
Visual Acuity ◽  
High Myopia ◽  
Optical Quality ◽  
Visual Performance ◽  
Quality Analysis ◽  
Modulation Transfer ◽  
Implantable Collamer Lens ◽  
Good Visual Acuity ◽  
Significant Difference ◽  
Group 6

Abstract Background To compare visual performance between the iris-fixated phakic intraocular len (pIOL) and implantable collamer len (ICL) to correct high myopia. Methods Twenty-four eyes underwent iris-fixated pIOL implantation and 24 eyes underwent ICL implantation. At the 6-month follow-up, the best-corrected visual acuity (BCVA) and uncorrected distance visual acuity (UDVA) were compared between the iris-fixated pIOL and ICL groups. The objective scatter index (OSI), modulation transfer function (MTF) cutoff, and ocular aberrations were performed to evaluate postoperative visual quality between the two groups. Results No significant difference was found in UDVA, BCVA, and spherical equivalent between the iris-fixated pIOL and ICL groups (P > 0.05). Six months after surgery, the following values were significantly higher in the ICL group than in the iris-fixated pIOL group: MTF cutoff, strehl ratio and optical quality analysis system values at contrasts of 9 %, 20 %, and 100 % (P < 0.01). The OSI in the iris-fixated pIOL group was higher than in the ICL group 6 months after surgery (P < 0.01). All high-order aberrations were slightly more severe in the iris-fixated pIOL group than in the ICL group 6 months after surgery, although only trefoil (P = 0.023) differed significantly in this regard. Conclusions Both iris-fixated lenses and ICLs can provide good visual acuity. ICLs confer better visual performance in MTF-associated parameters and induce less intraocular light scattering than iris-fixated pIOLs.

scholarly journals Visual performance in a flight simulator: multifocal intraocular lenses in pilots

2018 ◽  
Vol 3 (1) ◽  
pp. e000139
Author(s):  
Lee Lenton
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Luminance Contrast ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Flight Simulator ◽  
Night Time ◽  
Multifocal Intraocular Lenses ◽  
Low Luminance ◽  
Visual Tasks

ObjectiveTo compare the performance of adults with multifocal intraocular lenses (MIOLs) in a realistic flight simulator with age-matched adults with monofocal intraocular lenses (IOLs).Methods and AnalysisTwenty-five adults ≥60 years with either bilateral MIOL or bilateral IOL implantation were enrolled. Visual function tests included visual acuity and contrast sensitivity under photopic and mesopic conditions, defocus curves and low luminance contrast sensitivity tests in the presence and absence of glare (Mesotest II), as well as halo size measurement using an app-based halometer (Aston halometer). Flight simulator performance was assessed in a fixed-based flight simulator (PS4.5). Subjects completed three simulated landing runs in both daytime and night-time conditions in a randomised order, including a series of visual tasks critical for safety.ResultsOf the 25 age-matched enrolled subjects, 13 had bilateral MIOLs and 12 had bilateral IOLs. Photopic and mesopic visual acuity or contrast sensitivity were not significantly different between the groups. Larger halo areas were seen in the MIOL group and Mesotest values were significantly worse in the MIOL group, both with and without glare. The defocus curves showed better uncorrected visual acuity at intermediate and near distances for the MIOL group. There were no significant differences regarding performance of the vision-related flight simulator tasks between both groups.ConclusionsThe performance of visually related flight simulator tasks was not significantly impaired in older adults with MIOLs compared with age-matched adults with monofocal IOLs. These findings suggest that MIOLs do not impair visual performance in a flight simulator.

scholarly journals Visual acuity and image quality in 5 diffractive intraocular lenses

2017 ◽  
Vol 28 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Genís Cardona ◽  
Fidel Vega ◽  
Miguel A. Gil ◽  
Consuelo Varón ◽  
José A. Buil ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Image Quality ◽  
Optical Quality ◽  
Intraocular Lenses ◽  
Modulation Transfer ◽  
Multifocal Intraocular Lenses ◽  
Corrected Distance Visual Acuity ◽  
Good For

Purpose: To compare objective image quality at distant, intermediate, and near foci with the corresponding visual acuity (VA) in patients symmetrically implanted with 5 different diffractive multifocal intraocular lenses (IOLs) (ReSTOR SV25T0, Tecnis ZKB00, Tecnis ZLB00, AT LISA 809, and AT LISA Tri 839MP) and a monofocal lens (Tecnis ZA9003) 3 months after cataract intervention. Methods: Objective image quality, measured as the area under the modulation transfer function curve (AMTF), was tested in vitro in an eye model. In addition, corrected distance visual acuity and distance-corrected intermediate and near visual acuities (DCIVA and DCNVA) were assessed in a group of 79 patients, randomly implanted with one of the lenses. Results: Image quality and VA at the distant focus was good for all lens designs, but was similarly compromised at the intermediate focus, where the best DCIVA corresponded to the low add ZKB00. At the near focus, the monofocal lens and the distance dominant SV25T0 had the worst AMTF values, with the ZLB00 presenting the best DCNVA. The relationship between AMTF and VA was found not to be linear, with VA being similarly good for AMTF values over a certain threshold. Conclusions: Visual acuity of pseudophakic patients reflected the optical quality of the specific IOL design within a certain range of measurements, beyond which maximum VA is limited by other ocular, optical, and neuropsychophysical factors.

scholarly journals Visual performance of four types of diffractive multifocal intraocular lenses and a review of articles

2021 ◽  
Vol 14 (3) ◽  
pp. 356-365
Author(s):  
Farideh Doroodgar ◽  
◽  
Azad Sanginabadi ◽  
Farid Karimian ◽  
Sana Niazi ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lenses ◽  
Multifocal Intraocular Lenses ◽  
Spatial Frequencies ◽  
Signed Rank ◽  
Pubmed Database ◽  
Significant Difference ◽  
The One ◽  
Post Hoc

AIM: To compare the clinical outcomes of a variety of multifocal intraocular lenses (MIOLs) in patients diagnosed with presbyopia or cataracts. METHODS: This clinical trial study included 141 patients (282 eyes) with different MIOLs implantation. The Symfony (60 eyes), the ReSTOR (100 eyes), the AT LISAtri (60 eyes), and the PanOptix (62 eyes) intraocular lenses were evaluated in this prospective interventional study. The near, intermediate, and distant visual acuities, contrast sensitivity, and defocus curve were measured as valid criteria. To statistically analyze the results, we used the Statistical Package for Social Science software, the non-parametric Wilcoxon signed-rank t, the one-way analysis of variance and the Tukey's post-hoc test in our analysis. Moreover, we conducted a detailed literature search on the PubMed database in English about MIOLs, in total 59 studies were included in this review article. RESULTS: The four approaches did not show any significant difference in the best-corrected distance visual acuity (P>0.05). The defocus curves at the contrast of 100% showed that trifocal IOLs had better intermediate performance than the bifocal IOL (P<0.05). There were no statistically significant differences between AT LISAtri and PanOptix lenses for visual acuity at all distances. The eyes with PanOptix, Symfony, and AT LISAtri IOL showed better contrast sensitivity than those ReSTOR at spatial frequencies of 1, 3, and 6 cpd in photopic and mesopic conditions (P<0.001). CONCLUSION: All four groups of the multifocal lenses were satisfying in terms of distance and near vision. Also, the group of trifocal lenses led to satisfactory outcomes in intermediate vision, without degradation in quality of vision.

scholarly journals Comparison of corneal optical quality after SMILE, wavefront-optimized LASIK and topography-guided LASIK for myopia and myopic astigmatism

2021 ◽  
Author(s):  
Yu Zhang ◽  
Xiaoxiao Sun ◽  
Yueguo Chen
Keyword(s):  
Visual Acuity ◽  
Optical Path Difference ◽  
Path Difference ◽  
Mean Value ◽  
Optical Quality ◽  
Distance Visual Acuity ◽  
Visual Outcomes ◽  
Corneal Aberrations ◽  
Uncorrected Distance Visual Acuity ◽  
Significant Difference

Abstract Purpose: To compare visual outcomes and corneal optical quality after small incision lenticule extraction (SMILE) , wavefront-optimized (WFO) FS-LASIK and topography-guided customized ablation treat­ment (TCAT) FS-LASIK for myopia. Methods: This prospective study included 283 eyes of 283 myopic patients who underwent SMILE or FS-LASIK according to the patient's wishes. FS-LASIK patients were randomly assigned to use WFO or TCAT ablation. There were 102 eyes, 100 eyes and 81eyes in the SMILE group, WFO group and TCAT group, respectively. The combined corneal topographer and tomographer system (Sirius) was used to measure corneal aberrations and optical quality. Visual outcomes and corneal aberrations were compared among the three groups.Results: At postoperative 1 and 6 months, there were no significant differences in uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) among the three groups (P > .05). Postoperative manifest refractive spherical equivalent was similar among the groups (P > .05). There was statisti­cally significant difference in cylinder at 1 month among the three groups, with the highest mean value in TCAT group (P < .05). The corneal optical path difference (OPD), root mean square of corneal astigmatism and strehl ratio (SR) were the most superior in the TCAT group at postoperative 1 and 6 months (P < .05).Conclusion: SMILE, WFO FS-LASIK and TCAT FS-LASIK provided similar visual results. TCAT FS-LASIK could induce fewer corneal OPD and astigmatism, and higher SR than the others. However, a better algorithm for TCAT FS-LASIK is needed to decrease postoperative residual astigmatism.

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