scholarly journals Weight of Different Intraocular Lenses: Evaluation of Toricity, Focality, Design, and Material

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Ángel López-Vázquez ◽  
Inés Contreras ◽  
Sergio Martin-Prieto ◽  
Ángel López-Castro
Keyword(s):  
Design Methods ◽  
Intraocular Lenses ◽  
Capsular Tension Ring ◽  
Plate Design ◽  
Hydrophilic Material ◽  
Dioptric Power

Purpose. To evaluate the weight of intraocular lenses (IOLs) depending on their material, dioptric power, toricity, focality, and haptic design. Methods. Twenty-eight different IOL models from nine different medical companies (a total of 38 IOLs) and 1 capsular tension ring (CTR) were evaluated. IOLs were weighed using a precision scale, in hydrated conditions, as an approximation to their intraocular status. Results. Hydrophilic IOLs were heavier than hydrophobic lenses ( p < 0.001 ). Regarding toricity, no statistical differences were found comparing toric to non-toric models ( p = 0.1 ). Likewise, no differences were found between multifocal IOLs and monofocal IOLs ( p = 0.19 ). Dioptric power did not affect IOL weight: IOLs of <15DP had similar weights to those of ≥15D and IOLs of ≥24D had similar weights to those of <24 D ( p = 0.86 and p = 0.59 , respectively). Plate-design IOLs were significantly heavier than 1-piece C-loop ( p < 0.001 ), 3-piece C-loop ( p < 0.001 ), and 4-haptic lenses ( p = 0.001 ). Conclusions. Of the characteristics analyzed that might influence IOL weight, lenses with hydrophilic material and plate-haptic design were found to be heavier. Toricity, focality, and dioptric power had no influence on IOL weight.

scholarly journals Comparison of glistenings formation and their effect on forward light scatter between the Acrysof SN60WF and Eternity Natural Uni NW-60 intraocular lenses

2020 ◽  
Vol 5 (1) ◽  
pp. e000399
Author(s):  
Eva Philippaki ◽  
David P O'Brart ◽  
Chistopher C. Hull
Keyword(s):  
Image Processing ◽  
Intraocular Lenses ◽  
Accelerated Ageing ◽  
Light Scatter ◽  
Optical Bench ◽  
Median Increase ◽  
Single Piece ◽  
Dioptric Power ◽  
Processing Software ◽  
Image Processing Software

AimsTo compare the characteristics of glistenings and forward light scatter between the Alcon Acrysof SN60WF and Santen Eternity Natural Uni NW-60 intraocular lenses (IOLs).MethodsFive Acrysof SN60WF and five Eternity Natural Uni NW-60 IOLs were studied. All IOLs were single piece blue blockers with the same dioptric power (20D) and optic diameter (6.0 mm). Glistenings were induced by a thermal accelerated ageing process. Glistenings were objectively quantified using bespoke image processing software. The angular distribution of forward light scatter was measured using an optical bench system and the straylight parameter calculated from the light scatter function.ResultsThe median increase in the number of glistenings was 15 and 525 for the Eternity and Acrysof IOLs, respectively, which was statistically significantly different (p=0.012). Median glistenings diameter was 23.8 μm (Acrysof) and 32.8 μm (Eternity). Four (80%) of the Acrysof lenses had straylight values higher than a 20-year-old CIE standard glare observer and in two cases the straylight exceeded that of the 70-year-old CIE standard glare observer. None of the Eternity lenses had straylight values that exceeded the value for the 20-year-old CIE standard glare observer.ConclusionsThe Eternity Natural Uni NW-60 IOLs resisted the induction of glistenings more than the Acrysof SN60WF IOLs. Although the Acrysof IOLs developed smaller glistenings than the Eternity IOLs, there were sufficient numbers to produce a higher straylight parameter.

Combining primary and sulcus piggyback IOLs for the correction of a spherical-cylindrical defect in an eye with abnormal cornea

2021 ◽  
pp. 112067212110378
Author(s):  
Fabrizio Gaetano Saverio Franco ◽  
Cristina Nicolosi ◽  
Giulio Vicini ◽  
Piero Grasso Cannizzo ◽  
Gianni Virgili ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lenses ◽  
Posterior Chamber ◽  
Refractive Errors ◽  
Dioptric Power ◽  
Iol Power ◽  
Monofocal Iol ◽  
Myopic Astigmatism ◽  
Posterior Chamber Iol ◽  
High Myopic Astigmatism

Introduction: Piggyback IntraOcular Lenses (IOLs), or supplementary secondary implant lenses, have been developed to provide a sufficient dioptric power in eyes with high refractive defects, which are not fully correctable after cataract surgery with single IOL in the range of powers available. These lenses can also be used for the correction of refractive errors that occurred for a wrong choice of the IOL power after cataract surgery. Case description: We report the case of a complete refractive success obtained in a patient with an abnormal cornea, with a central stable ectasia, with thinning, high myopic astigmatism and cataract, obtained with the implant of a primary posterior chamber IOL at the time of cataract surgery and a subsequent implant of a secondary piggyback, sulcus-based customized toric IOL (Camellens FIL 622-2 Toric Monofocal IOL, Soleko, Rome, Italy). Conclusions: This brief report demonstrates the utility of combining primary and piggyback IOLs implant for the correction of a complex spherical-cylindrical refractive defect in a case of abnormal cornea and cataract.

Trans-iris fixation of dislocated in-the-bag intraocular lenses

2019 ◽  
Vol 30 (3) ◽  
pp. 538-542
Author(s):  
Amir Faramarzi ◽  
Sepehr Feizi ◽  
Shahin Yazdani
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Intraocular Lenses ◽  
Posterior Chamber ◽  
Lens Dislocation ◽  
Capsular Tension Ring ◽  
Intraocular Lens Dislocation ◽  
Late Dislocation ◽  
Iris Fixation ◽  
Capsular Bag

Purpose: The aim of this article is to describe the safety and efficacy of trans-iris suture fixation for the management of late dislocation of in-the-capsular-bag intraocular lenses following uncomplicated cataract surgery. Patients and methods: Eleven eyes of 11 patients with late in-the-capsular-bag intraocular lens dislocation following uneventful phacoemulsification cataract surgery were recruited in the study. The dislocated intraocular lens–capsular bag complex was sutured to the iris at two points 180° apart using 9-0 polypropylene sutures on long needles. Results: Mean patient age was 67 ± 6 years. Seven eyes had pseudoexfoliation syndrome, one eye had Marfan syndrome, and another eye had a traumatic cataract; no risk factor was identified for intraocular lens dislocation in two eyes. A capsular tension ring had been implanted during cataract surgery in four eyes. In six eyes, the posterior chamber intraocular lenses were one-piece foldable while the remaining were three-piece intraocular lenses. Compared to the preoperative value, corrected distance visual acuity was significantly improved postoperatively ( p < 0.005). Intraoperative hyphema occurred in two eyes. Pupil ovalization was observed in all eyes. Mean endothelial cell count decreased by 4 ± 1.7% after intraocular lens fixation. The capsular bag–intraocular lens complex was stable and well-centered in the pupillary area in all eyes at the final follow-up examination which was performed 16 ± 4 months postoperatively. Conclusion: Trans-iris fixation is a simple and effective procedure for management of late intraocular lenses–capsular bag complex dislocation, without major complications.

scholarly journals Enhancing rotational stability of toric intraocular lenses using a type 2L Cionni capsular tension ring in patients with high myopia

2019 ◽  
Vol 45 (9) ◽  
pp. 1219-1221 ◽  
Author(s):  
Calin Petru Tataru ◽  
Anca Cristina Dogaroiu ◽  
Catalina Ioana Tataru ◽  
Catalin Dogaroiu
Keyword(s):  
High Myopia ◽  
Intraocular Lenses ◽  
Rotational Stability ◽  
Capsular Tension Ring

Testing the dioptric power accuracy of exact-power-labeled intraocular lenses

2009 ◽  
Vol 35 (11) ◽  
pp. 1995-1999 ◽  
Author(s):  
Kenneth J. Hoffer ◽  
Don Calogero ◽  
Robert W. Faaland ◽  
Ilko K. Ilev
Keyword(s):  
Intraocular Lenses ◽  
Exact Power ◽  
Dioptric Power

Rotational Stability of Toric Intraocular Lenses with a Newly Modified Capsular Tension Ring

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
John Zdral ◽  
Liliana Werner ◽  
Nick Mamalis ◽  
Sneha Bontu ◽  
Sean Kennedy ◽  
...  
Keyword(s):  
Intraocular Lenses ◽  
Rotational Stability ◽  
Capsular Tension Ring

scholarly journals Quantifying the Multiwavelength Dispersion Effect on Dioptric Power Measurement of Intraocular Lenses

2015 ◽  
Vol 7 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Bennett N. Walker ◽  
Robert H. James ◽  
Don Calogero ◽  
Ilko K. Ilev
Keyword(s):  
Intraocular Lenses ◽  
Power Measurement ◽  
Dispersion Effect ◽  
Dioptric Power
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