scholarly journals Metric-Based Visual Acuity and Defocus Curve Simulation of Two Multifocal Intraocular Lens Models

2020 ◽  
Vol Volume 14 ◽  
pp. 4579-4586
Author(s):  
Lin He ◽  
Xin Hong ◽  
Rajaraman Suryakumar ◽  
Ramesh Sarangapani
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Multifocal Intraocular Lens ◽  
Defocus Curve

scholarly journals Objective and subjective evaluation of trifocal diffractive intraocular Lens after cataract extraction with phacoemulsification: a prospective clinical study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ahmed A. Zein El-Dein ◽  
Ahmed Elmassry ◽  
Hazem M. El-Hennawi ◽  
Ehab F. Mossallam
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Subjective Evaluation ◽  
Cataract Extraction ◽  
Prospective Clinical Study ◽  
Gradual Change ◽  
Quality Of Vision ◽  
Defocus Curve

Abstract Background This study aimed to assess visual outcomes, quality of vision and patients’ satisfaction of a trifocal diffractive intraocular lens after cataract surgery with phacoemulsification. Results The study included 36 eyes that underwent implantation of trifocal diffractive intraocular lens (IOL). The residual mean postoperative spherical equivalent was − 0.40 ± 0.29 diopters. Mean Uncorrected distance visual acuity was 0.80 ± 0.16 decimal (snellen equivalent 25 ft) while mean Uncorrected intermediate visual acuity was 0.82 ± 0.31 decimal (snellen equivalent 25 ft) and mean Uncorrected near visual acuity (UCNVA) was 0.87 ± 0.20 decimal (snellen equivalent 23 ft). In defocus curve, there was infinitesimal gradual change between the three foci. Contrast sensitivity was just below the inferior limit of normal. Conclusion Trifocal diffractive IOL created a true intermediate focus proved by VA and defocus curve and better quality of vision assessed by contrast sensitivity and high order aberration. Moreover, it was safe and effective for correcting distance and near vision in these patients. Most of the patients were very satisfied and achieved spectacle independence. Trial registration Registration number and date: NCT04465279 on July 10, 2020.

scholarly journals Clinical outcomes with a diffractive trifocal intraocular lens

2018 ◽  
Vol 28 (4) ◽  
pp. 419-424 ◽  
Author(s):  
Jorge L Alió ◽  
Ana B Plaza-Puche ◽  
Jorge L Alió del Barrio ◽  
Pedro Amat-Peral ◽  
Vicente Ortuño ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Case Series ◽  
Optical Quality ◽  
Near Vision ◽  
Case Series Study ◽  
Defocus Curve ◽  
Near Visual Acuity

Purpose: To evaluate clinical and visual outcomes, quality of near vision, and intraocular optical quality of patients bilaterally implanted with a trifocal PanOptix intraocular lens. Methods: In this prospective consecutive case-series study, 52 eyes of 26 bilateral patients (mean age, 60.2 ± 7.4 years) were implanted with the AcrySof IQ Panoptix intraocular lens. Visual acuity, defocus curve, contrast sensitivity (Pelli-Robson test), near activity visual questionnaire, and internal aberrations with Osiris were evaluated. A prototype light-distortion analyzer was used to quantify the postoperative light-distortion indices. The follow-up was 6 months after surgery. Results: Uncorrected, corrected distance, and uncorrected near visual acuities improved with the surgery (p ≤ 0.02). Distance corrected near visual acuity was 0.13 ± 0.10, 0.13 ± 0.13, and 0.13 ± 0.08 at 1, 3, and 6 months after surgery, respectively (p = 0.82). Distance corrected intermediate visual acuities were 0.09 ± 0.13, 0.13 ± 0.15, and 0.12 ± 0.12 at 1, 3, and 6 months, postoperatively. Binocular contrast sensitivity was 1.86 ± 0.15 Log Units. Defocus curve provided a visual acuity equal or better to 0.30 LogMAR between defocus levels of +0.50 to −3.00 D. The near activity visual questionnaire scores improved significantly with the surgery (p < 0.01). Conclusion: The AcrySof IQ Panoptix intraocular lens is able to restore visual function with an acceptable intermediate and near vision after cataract surgery with good contrast sensitivity and an improvement in the near activity visual questionnaire.

Pseudoaccommodation and Visual Acuity With Technovision PresbyLASIK and a Theoretical Simulated Array® Multifocal Intraocular Lens

2008 ◽  
Vol 24 (4) ◽  
pp. 344-349 ◽  
Author(s):  
Carlos Illueca ◽  
Jorge L. Alió ◽  
David Mas ◽  
Dolores Ortiz ◽  
Jorge Pérez ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Multifocal Intraocular Lens

Bioptics for high hyperopia with combined multifocal intraocular lens implantation and excimer ablation in young patients

2018 ◽  
Vol 29 (4) ◽  
pp. 426-430 ◽  
Author(s):  
Omer Trivizki ◽  
David Smadja ◽  
Michael Mimouni ◽  
Samuel Levinger ◽  
Eliya Levinger
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Laser In Situ Keratomileusis ◽  
Intraocular Lens Implantation ◽  
Multifocal Intraocular Lens ◽  
Distance Visual Acuity ◽  
Lens Implantation ◽  
Near Visual Acuity ◽  
High Hyperopia

Purpose:To analyze the visual and refractive outcome of the bioptics procedure combining multifocal intraocular lens implantation and excimer laser surgery in young patients with high hyperopic eyes not suitable for a single surgical procedure.Methods:This retrospective case series included 10 eyes of five patients (age range 18–30 years) with high hyperopia (spherical equivalent +8.51 ± 0.85 diopters (D)). They had been treated with serial multifocal intraocular lens implantation followed 6 weeks later by laser in situ keratomileusis for residual hyperopia. Uncorrected distance visual acuity, uncorrected near visual acuity, corrected distance visual acuity, corrected near visual acuity, and manifest refraction were evaluated before surgeries, after multifocal intraocular lens implantation, and 3 months post laser in situ keratomileusis.Results:No patients were lost to follow-up (6 months). The mean spherical equivalent decreased to +2.05 ± 1.33 D after multifocal intraocular lens implantation and to −0.10 ± 0.58 D after the laser in situ keratomileusis procedure. Success of the procedures was determined by uncorrected visual acuity. LogMAR uncorrected distance visual acuity improved by a total of more than six lines from 1.05 ± 0.18 LogMAR to 0.46 ± 0.12 LogMAR post multifocal intraocular lens implantation and to 0.15 ± 0.06 LogMAR after both surgeries. The LogMAR uncorrected near visual acuity increased by 0.81 ± 0.82 LogMAR after lens implantation due to loss of accommodation, and all eyes reached a LogMAR of 0 at 1 month postoperatively following laser in situ keratomileusis.Conclusions:A bioptics approach involving multifocal intraocular lens followed 6 weeks later by a laser in situ keratomileusis procedure for the correction of very high hyperopia enabled the resolution of the residual refractive error in young very high hyperopic patients.

scholarly journals Refractive Lens Exchange with Multifocal Intraocular Lens for Treatment of Chronic Intermittent Spasm of the Near Reflex

2017 ◽  
Vol 8 (3) ◽  
pp. 539-544 ◽  
Author(s):  
Guy Sallet
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Spontaneous Recovery ◽  
Multifocal Intraocular Lens ◽  
Refractive Lens Exchange ◽  
Final Treatment ◽  
Uncorrected Visual Acuity ◽  
Refractive Lens ◽  
Near Visual Acuity ◽  
Near Reflex

We report the case of an emmetropic 32-year-old female with decreased uncorrected visual acuity and diplopia due to intermittent episodes of spasm of the near reflex. Neurologic, general, and ophthalmic examination could not find an organic cause. Attempts at spontaneous recovery, psychogenic therapy, and cycloplegic therapy were unsuccessful and the symptoms persisted for almost 5 years, leading to psychogenic distress. Final treatment with refractive lens exchange and implantation of a toric trifocal intraocular lens resolved the spasm of the near reflex, resulting in an uncorrected distance and near visual acuity of 20/20.

scholarly journals Analyzing the reasons for patients’ dissatisfaction with the results of multifocal intraocular lens implantation

2014 ◽  
Vol 95 (4) ◽  
pp. 515-519
Author(s):  
K S Ivonin
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Intraocular Lenses ◽  
Intraocular Lens Implantation ◽  
Multifocal Intraocular Lens ◽  
Multifocal Intraocular Lenses ◽  
Spatial Contrast Sensitivity ◽  
Lens Implantation ◽  
Light Side

Aim. To analyze the causes for patients’ dissatisfaction with the results of multifocal intraocular lens implantation. Methods. The research is based on the results of cataract surgeries in 220 patients (50 patients were implanted multifocal refractive intraocular «M-flex» lens, 40 - multifocal intraocular «Gradiol» lens, 64 - multifocal intraocular «Accord» lens, 66 - monofocal intraocular lens). Pre-and post-operative examination included visual acuity test (with and without correction to near, far and moderate distances), determination of the nearest point of clear vision, contrast sensitivity study using the «Zebra» software, stereo vision test, pupil diameter measuring, refractometry, keratometry, binocular vision color tests, patient questioning. Pre-operative evaluation was performed 1 day prior to surgery. Post-operative observation was carried out 1 week, 1, 3, 6 and 12 months after the surgery. Results. No statistically significant difference (p 0.05) in uncorrected visual acuity at different light intensity - 102 lux and 416 lux - was found between the groups with different types of multifocal intraocular lenses. In groups with multifocal intraocular lenses light side effects were observed in 46-52.5% of patients. However, there was no link between the light side effects and patients’ satisfaction with results of the surgery. Reduction of spatial contrast sensitivity parameters was registered in all groups of multifocal intraocular lenses patients compared to patients with monofocal intraocular lenses (p 0.05). According to the survey results, 92.5 to 94% of patients with multifocal intraocular lenses did not report decreased visual acuity on moderate distance. Conclusion. The most important reason for patients’ dissatisfaction with the results of the multifocal intraocular lenses implanting was the reduction of spatial-contrast sensitivity parameters. Bilateral multifocal intraocular lenses implanting improved the contrast ratio.

scholarly journals Visual and Refractive Outcomes following Bilateral Implantation of Extended Range of Vision Intraocular Lens with Micromonovision

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Sri Ganesh ◽  
Sheetal Brar ◽  
Archana Pawar ◽  
Kirti J. Relekar
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Reading Acuity ◽  
Good Tolerance ◽  
Iol Implantation ◽  
Refractive Outcomes ◽  
Intermediate Vision ◽  
Defocus Curve ◽  
Near Visual Acuity

Purpose. To evaluate the outcomes following bilateral ERV intraocular lens implantation with micromonovision.Methods. 25 subjects underwent bilateral Tecnis Symfony IOL implantation with micromonovision. The dominant eye was targeted for emmetropia and the nondominant eye for myopia of −0.75 D. Uncorrected and corrected distance (UDVA, CDVA), intermediate (UIVA, CIVA), and near visual acuity (UNVA, DCNVA); reading performance; defocus curve; and contrast sensitivity were studied. Follow-ups were conducted at 1 week and 1 and 6 months postoperatively.Results. At 6 months postoperatively, the mean binocular UDVA, CDVA, UNVA, and DCNVA were −0.036 ± 0.09, −0.108 ± 0.07, 0.152 ± 0.11, and 0.216 ± 0.10 logMAR, respectively. Binocular UIVA and DCIVA were 0.048 ± 0.09 and 0.104 ± 0.08 logMAR, respectively, at 60 cm and −0.044 ± 0.09 and 0.012 ± 0.09 logMAR, respectively, at 80 cm. All patients had ≥0.2 logMAR UDVA and UNVA. Reading acuity and reading speeds showed improvement over time. Between defocus range of −2.50 and +1.00 D, the visual acuity remained ≥0.2 logMAR. Contrast sensitivity scores were within the normal range. 4 patients used reading glasses for very fine print.Conclusion. Bilateral ERV IOL implantation leads to excellent outcomes for far and intermediate vision, satisfactory outcomes for near vision, and good tolerance to micromonovision at the end of the 6 months. This trial is registered withCTRI/2015/10/006246.

Comparative Analysis of a New Hybrid EDOF-Multifocal Diffractive Intraocular Lens with a Trifocal Diffractive Intraocular Lens

2021 ◽  
pp. 112067212110676
Author(s):  
Cem Ozturkmen ◽  
Cem Kesim ◽  
Pinar Gunel Karadeniz ◽  
Afsun Sahin
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Visual Quality ◽  
Visual Performance ◽  
Significant Difference ◽  
Defocus Curve ◽  
Visual Quality Of Life ◽  
Cataract Patients ◽  
Diffractive Iol

Purpose To compare visual acuity, defocus curve and visual quality of life performances of a new hybrid refractive-diffractive intraocular lens (IOL) and a trifocal diffractive IOL. Methods Patients who underwent cataract surgery with bilateral implantation of ZFR00V or TFNT00 IOLs were enrolled in this study. The main outcomes were defined as uncorrected distant, intermediate and near visual acuities (UDVA, UIVA and UNVA, respectively), defocus curve and VF-14 questionnaire aimed for visual performance. Results Fifty patients, of whom 30 had bilateral ZFR00V implantation, were enrolled in the study. Patients with ZFR00V had significantly better UIVA than patients with TFNT00 (0.05 ± 0.03 vs. 0.07 ± 0.04 logMAR, P = 0.02). Defocus curve showed significantly higher visual acuity in intermediate range for ZFR00V IOL between −1.00 and −1.50 dioptres (all P < 0.05). All patients had good visual performance with mean VF-14 scores above 3 points with no significant difference between two IOL models. Spectacle independence was 100% for both distant and near vision in both group of patients. Conclusion Bilateral implantation of ZFR00V in cataract patients shows better intermediate visual acuity scores and similar daily visual performance when compared with trifocal TFNT00 IOL.

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