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Intraocular lenses

Mustafa Erdoğan Cicik, Cezmi Doğan, Selim Bölükbaşı, Mehmet Necdet Cinhüseyinoğlu, Osman Şevki Arslan
BACKGROUND: Pediatric cataract surgery differs substantially from adult cataract surgery. Numerous studies have focused on reducing the development of postoperative complications. AIMS: To compare two intraocular lens implantation techniques used in pediatric cataract surgery in terms of postoperative complications. STUDY DESIGN: Case-control study. METHODS: Patients who underwent pediatric cataract surgery and intraocular lens implantation between 2008 and 2016 were evaluated in this retrospective study...
March 15, 2018: Balkan Medical Journal
Bryan S Lee, David F Chang
PURPOSE: To compare the rotational stability of the 2 most commonly used toric intraocular lenses (TIOLs). DESIGN: Retrospective cohort study in a single private practice. SUBJECTS: The study included all patients receiving an Acrysof (n = 626) or Tecnis TIOL (n = 647) over an 18-month period from April 2015 to September 2016. Patients were only excluded if their surgery could not be performed using a digital marking system. METHODS: All patients had cataract surgery performed in the same surgical center with a similar technique...
March 12, 2018: Ophthalmology
Eric Nudleman, Yoshihiro Yonekawa, Jonathan L Prenner
PURPOSE OF REVIEW: The surgical approach to eyes needing a secondary intraocular lens have evolved rapidly in recent years. Here, we will focus on techniques for scleral-fixation of intraocular lenses (IOLs), and will review the evidence for their safety and efficacy. RECENT FINDINGS: Transscleral fixation of IOLs refers the placement of lens haptics within scleral tunnels to stabilize the lens in eyes that lack adequate capsular support. Various surgical techniques have been reported recently to accomplish this goal...
March 13, 2018: Current Opinion in Ophthalmology
Konstantinos Andreanos, Petros Petrou, Dimitrios Spyropoulos, Dimitrios Papaconstantinou, Dimitrios Brouzas, Ilias Georgalas
No abstract text is available yet for this article.
March 14, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
Heinrich Gerding
BACKGROUND: Recent case reports have indicated that intraocular lenses may be discoloured by systemically or locally applied fluorescein. Since very few data are available on the susceptibility of intraocular lenses to fluorescein, an experimental survey on lens discolouration was performed. MATERIAL AND METHODS: Intraocular lenses fabricated from polmethylmethacrylate (PMMA), silicone, hydrophobic acrylic copolymers, and hydrophilic acrylic copolymers were exposed to 10% fluorescein...
March 12, 2018: Klinische Monatsblätter Für Augenheilkunde
Wenwen He, Xiaodi Qiu, Shaohua Zhang, Yu Du, Yinglei Zhang, Yi Lu, Xiangjia Zhu
PURPOSE: To compare the long-term decentration and tilt in two multifocal intraocular lenses (MfIOLs) with an OPD-Scan III aberrometer. METHODS: Eighty cataract patients who underwent uneventful MfIOL implantation (42 with AcrySof® IQ ReSTOR® SN6AD1 and 38 with AMO Tecnis® ZMB00) were enrolled. At 1 year after surgery, a postoperative visual acuity evaluation included the measurement of uncorrected distance visual acuity, corrected distance visual acuity, distance-corrected near visual acuity, and distance-corrected intermediate visual acuity...
March 9, 2018: Eye
Laura Ferlauto, Marta Jole Ildelfonsa Airaghi Leccardi, Naïg Aurelia Ludmilla Chenais, Samuel Charles Antoine Gilliéron, Paola Vagni, Michele Bevilacqua, Thomas J Wolfensberger, Kevin Sivula, Diego Ghezzi
Retinal prostheses have been developed to fight blindness in people affected by outer retinal layer dystrophies. To date, few hundred patients have received a retinal implant. Inspired by intraocular lenses, we have designed a foldable and photovoltaic wide-field epiretinal prosthesis (named POLYRETINA) capable of stimulating wireless retinal ganglion cells. Here we show that within a visual angle of 46.3 degrees, POLYRETINA embeds 2215 stimulating pixels, of which 967 are in the central area of 5 mm, it is foldable to allow implantation through a small scleral incision, and it has a hemispherical shape to match the curvature of the eye...
March 8, 2018: Nature Communications
Ioana Madalina Iliescu, Maria Alexandra Constantin, Cristina Cozma, Ozana Manuela Moraru, Cristian Mircea Moraru
Purpose: To evaluate the influence of Intraocular Lens (IOL) material and design on Posterior Capsule Opacification (PCO) and Neodymium-YAG (Nd-YAG) rates in eyes implanted with different Posterior Chamber Intraocular Lenses (PC IOLs) designs at the end of uncomplicated cataract surgeries. Setting: Oculus Eye Clinic, Bucharest, Romania. Design: Retrospective, observational study. Methods: This study comprised 4805 eyes operated for cataract in 2012 and 2013 with a post-operative average follow up of 40 ± 6,15 months (27-54 months)...
October 2017: Romanian Journal of Ophthalmology
Chan Min Yang, Dong Hui Lim, Sungsoon Hwang, Joo Hyun, Tae-Young Chung
BACKGROUND: To evaluate monocular and binocular visual outcomes for near, intermediate, and far distance in patients implanted with diffractive multifocal intraocular lenses (IOLs) with different add power contralaterally. METHODS: This is a prospective contralateral study. Two diffractive multifocal IOLs with different added power were implanted bilaterally in twenty patients. TECNIS® ZKB00 (+ 2.75 D) was implanted in a dominant eye, and TECNIS® ZLB00 (+ 3...
March 7, 2018: BMC Ophthalmology
Laura Remón, Damian Siedlecki, Iulen Cabeza-Gil, Begoña Calvo
Intraocular lenses (IOLs) are used in the cataract treatment for surgical replacement of the opacified crystalline lens. Before being implanted they have to pass the strict quality control to guarantee a good biomechanical stability inside the capsular bag, avoiding the rotation, and to provide a good optical quality. The goal of this study was to investigate the influence of the material and haptic design on the behavior of the IOLs under dynamic compression condition. For this purpose, the strain-stress characteristics of the hydrophobic and hydrophilic materials were estimated experimentally...
March 2018: Journal of Biomedical Optics
Daniel Carson, Sangyeol Lee, Elsinore Alexander, Xin Wei, Shinwook Lee
Purpose: Multifocal intraocular lenses (IOLs) can be associated with unwanted visual phenomena, including halos. Predicting potential for halos is desirable when designing new multifocal IOLs. Halo images from 6 IOL models were compared using the Optikos modulation transfer function bench system and a new high dynamic range (HDR) system. Materials and methods: One monofocal, 1 extended depth of focus, and 4 multifocal IOLs were evaluated. An off-the-shelf optical bench was used to simulate a distant (>50 m) car headlight and record images...
2018: Clinical Ophthalmology
Spyridon Dimopoulos, Vasileios Dimopoulos, Gunnar Blumenstock, Hugo Trevino-Rodriguez, Karl Ulrich Bartz-Schmidt, Martin S Spitzer, Bogomil Voykov
PURPOSE: To assess the long-term results and complications of scleral-fixated posterior chamber intraocular lenses (PC IOLs) with the knotless Z-suture technique. SETTING: University Eye Hospital, Tübingen, Germany. DESIGN: Retrospective case series. METHODS: Records of consecutive patients who had implantation of scleral-fixated PC IOLs with the knotless Z-suture technique with a minimum follow-up of 3 years were reviewed...
March 2, 2018: Journal of Cataract and Refractive Surgery
AnnMarie Hipsley, Brad Hall, Karolinne M Rocha
Presbyopia corrections traditionally have been approached with attempts to exchange power, either at the cornea or the lens planes, inducing multifocality, or altering asphericity to impact the optical system. Treatments that affect the visual axis, such as spectacle and contact lens correction, refractive surgeries, corneal onlays and inlays, and intraocular lenses are typically unable to restore true accommodation to the presbyopic eye. Their aim is instead to enhance 'pseudoaccommodation' by facilitating an extended depth-of-focus for which vision is sufficient...
2018: Eye and Vision (London, England)
Anju Rastogi, Samreen Khanam, Yashpal Goel, Prolima Thacker, Prateek Kumar
Purpose: To evaluate the rotational stability of toric intraocular lens (IOL) when co-implanted with a capsular tension ring (CTR) as compared to that of a toric IOL without a CTR. Methods: This was a prospective randomized clinical trial performed in a tertiary care centre in India. Fifty adult human eyes with visually significant cataract and regular corneal astigmatism ≥1.5D divided into two groups of 25 eyes each, A and B by simple randomization. Eyes with corneal pathology, lens subluxation, and a specular endothelial cell count <2000/mm2 were excluded from the study...
March 2018: Indian Journal of Ophthalmology
Leonid L Doskolovich, Evgeni A Bezus, Andrey A Morozov, Vladimir Osipov, James S Wolffsohn, Boris Chichkov
We propose a method for designing multifocal diffractive lenses generating prescribed sets of foci with fixed positions at several different wavelengths. The method is based on minimizing the difference between the complex amplitudes of the beams generated by the lens microrelief at the design wavelengths, and the functions of the complex transmission of multifocal lenses calculated for these wavelengths. As an example, a zone plate generating three fixed foci at three different wavelengths was designed, fabricated, and experimentally investigated...
February 19, 2018: Optics Express
Varshini Varadaraj, Malik Y Kahook, Pradeep Y Ramulu, Ian F Pitha
PURPOSE: To assess patient acceptance of different methods for delivering sustained-release, intraocular pressure (IOP) lowering medications METHODS:: Electronic surveys were administered to 150 patients at two glaucoma clinics. Participants were questioned on their willingness to accept: (1) drug-eluting contact lenses, (2) ring inserts (3) punctal plugs, and (4) sub-conjunctival injections as alternatives to IOP-lowering eye drops based on various success levels. Multivariable logistic regression models determined the association between device type and treatment acceptance adjusting for age, gender, study site, cost burden of drops, and previous contact lens use...
February 16, 2018: Journal of Glaucoma
Duygu Gulmez Sevim, Ayse Ozturk Oner, Metin Unlu, Galip Ertugrul Mirza
A 25-year-old woman underwent diode laser application on the both upper eyelids in the dermatology department of a private hospital to obtain a cosmetic healing of the reddish look on her eyelids without any protective lenses. The patient experienced severe uveitis, atonic pupils, raised intraocular pressure, and increased sensitivity to light in her eyes on the following day of the procedure. Topical steroids and pressure-lowering agents were able to treat the acute uveitis and glaucoma, unfortunately the patient suffered from irreversible atonic and atrophic pupils and photosensitivity...
February 20, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Ana Topete, Andreia S Oliveira, A Fernandes, T G Nunes, A P Serro, B Saramago
Although the possibility of using drug-loaded ophthalmic lens to promote sustained drug release has been thoroughly pursued, there are still problems to be solved associated to the different alternatives. In this work, we went back to the traditional method of drug loading by soaking in the drug solution and tried to optimize the release profiles by changing the temperature and the time of loading. Two materials commercially available under the names of CI26Y and Definitive 50 were chosen. CI26Y is used for intraocular lenses (IOLs) and Definitive 50 for soft contact lenses (SCLs)...
February 14, 2018: European Journal of Pharmaceutical Sciences
Stefan A Kassumeh, Christian M Wertheimer, Annabel von Studnitz, Anna Hillenmayer, Claudia Priglinger, Armin Wolf, Wolfgang J Mayer, Daniel Teupser, Lesca M Holdt, Siegfried G Priglinger, Kirsten H Eibl-Lindner
PURPOSE: Posterior capsule opacification (PCO) still represents the main long-term complication of cataract surgery. Research into pharmacologic PCO prophylaxis is extensive. One promising candidate drug is methotrexate (MTX). Our aim is to determine the in vitro feasibility of MTX-loaded poly(lactic-co-glycolic) (PLGA) biomatrices sprayed on intraocular lenses (IOLs) as a drug-delivery implant. METHODS: Hydrophilic and hydrophobic acrylic IOLs were spray-coated with MTX-loaded PLGA...
February 16, 2018: Current Eye Research
Gregg T Kokame, Ryan T Yanagihara, Jessica G Shantha, Kyle N Kaneko
PURPOSE: To assess the long-term stability of sutured scleral-fixated posterior chamber intraocular lenses (PC IOL) performed in combination with pars plana vitrectomy. DESIGN: Retrospective, consecutive, interventional case series METHODS: Retrospective single-surgeon study of 118 eyes of 111 patients seen at Retina Consultants of Hawaii, who underwent sutured scleral fixation of at least one haptic of a posterior chamber intraocular lens with 10-0 polypropylene combined with a pars plana vitrectomy...
February 7, 2018: American Journal of Ophthalmology
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