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Intraocular lens silicon

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https://www.readbyqxmd.com/read/29454335/earliella-scabrosa-associated-postoperative-endophthalmitis-after-phacoemulsification-with-intraocular-lens-implantation-a-case-report
#1
Hong He, Xiaolian Chen, Hongshan Liu, Jiaochan Wu, Xingwu Zhong
BACKGROUND: Postoperative endophthalmitis after cataract surgery is a severe eye infection that can lead to irreversible blindness in the affected eye. The characteristics, treatment and prognosis of this disease vary because of its association with different pathogens. Here, we report what is possibly the first case of endophthalmitis after cataract surgery to be associated with the rare pathogen Earliella scabrosa. CASE PRESENTATION: A 56-year-old man from Hainan Island (China) with a history of phacoemulsification and type II diabetes mellitus underwent intraocular lens (IOL) implantation...
February 17, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29449964/consequences-of-inadvertent-intravitreal-mitomycin-c-injection
#2
Ahmad Mirshahi, Alireza Lashay, Mohammad Reza Mehrabi Bahar, Mojtaba Abrishami
Background: Mitomycin C (MMC) as an alkylating agent is miscellaneous an antineoplastic, antibiotic and ophthalmic agent. Here we aim to report a case of inadvertent intravitreal MMC injection instead of Avastin in case of diabetic macular edema. Case presentation: A 53 years old woman was planned to receive intravitreal Avastin injection, but accidentally, 0.05 ml of MMC 0.2% was injected. Best corrected visual acuity (BCVA) was 20/160 before injection. After 2 days, patient was referred to a tertiary referral eye center...
2018: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/29411497/the-effects-of-two-different-types-of-bandage-contact-lenses-on-the-healthy-canine-eye
#3
Barbara Katharina Braus, Daniela Riedler, Alexander Tichy, Joachim Spergser, Ilse Schwendenwein
OBJECTIVE: To compare two types of bandage contact lenses on the healthy canine eye. ANIMALS STUDIED: Six healthy Beagles. PROCEDURES: Two different types of bandage contact lenses (single sized human silicone contact lens 'PureVision 2' (Bausch & Lomb Incorporated, Rochester, NY, USA) and specially designed veterinary hydrogel contact lens 'AcriVet Pat D' (Bausch & Lomb Incorporated) were placed in 12 eyes of healthy Beagle dogs. Retention times and the effects of the lenses regarding irritation of the eye, changes in tear production, impact of contact lenses on tonometric readings, and cytologic and microbiological alterations of the canine eye were investigated...
February 6, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29403584/visual-outcomes-and-refractive-status-after-combined-silicone-oil-removal-cataract-surgery-with-intraocular-lens-implantation
#4
Hussain F Al-Habboubi, Waseem Al-Zamil, Ali A Al-Habboubi, Rajiv Khandekar
Purpose: To evaluate refractive status and identify predictors of surgical success following a combined silicone oil removal/cataract surgery with intraocular lens (IOL) implantation procedure. Methods: In this single-armed, retrospective study, we reviewed patients who underwent vitreoretinal surgery followed by a combined silicone oil removal/cataract surgery procedure between 2009 and 2013. Preoperative data included patient demographics, refractive status, IOL power, and axial length (measured with the IOL Master)...
January 2018: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/29335107/surgical-removal-of-dystrophic-calcification-on-a-silicone-intraocular-lens-in-association-with-asteroid-hyalosis
#5
Sean M Platt, Raymond Iezzi, Michael A Mahr, Jay C Erie
We present a case of successful removal of late calcium deposition on the posterior surface of a silicone intraocular lens (IOL) optic in association with asteroid hyalosis using a surgical technique that included pars plana vitrectomy, a lighted pick, and a modified silicone-tipped cannula. The lighted pick provided the most efficient and complete removal of calcium deposits. Postoperatively, the dystrophic calcification was removed and the IOL optic was clear at 6 months follow-up. The patient's symptoms resolved and uncorrected distance visual acuity returned to 20/20...
December 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29217945/a-3-year-review-of-the-outcome-of-pars-plana-vitrectomy-for-dropped-lens-fragments-after-cataract-surgery-in-a-tertiary-eye-hospital-in-dhaka-bangladesh
#6
Lateefat Olokoba, Tajul Islam, Nazmun Nahar, Abdulraheem Mahmoud, Abdulfatai Olokoba
Background: Dropped lens fragments into the vitreous are uncommon, but potentially sight threatening complications of cataract surgery. The recommended approach for removal of dropped lens matter is pars plana vitrectomy with or without ultrasonic emulsification with the fragmatome. This study aimed to determine the visual outcome following pars plana vitrectomy for dropped lens fragments complicating cataract surgery at 6 weeks, 3 months and 6 months. Methods: This study is a retrospective review of patients who had PPV as treatment for dropped lens fragments complicating cataract surgery at Ispahani Islamia Eye hospital and Institute...
July 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29208820/prevention-and-management-of-postoperative-endophthalmitis-a-case-based-approach
#7
REVIEW
Lalit Verma, Arindam Chakravarti
Endophthalmitis following intraocular surgery is a disastrous complication and can lead to poor visual outcomes and loss of globe integrity. It should be differentiated from toxic anterior segment syndrome (TASS) where management differs drastically. This article presents basic knowledge about postoperative endophthalmitis and describes nine different real-world scenarios ranging from TASS to milder forms of endophthalmitis responding to intravitreal antibiotics alone and more complicated forms associated with corneal involvement, fungal endophthalmitis and cases requiring intraocular lens removal, radical vitrectomy with hyaloid peeling, base dissection, and silicone oil...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29181312/phacoemulsification-combined-with-transpupillary-removal-of-silicone-oil-and-intracapsular-intraocular-lens-implantation
#8
Yu-Cheng Zhu, Dong-Qing Yuan, Ping Xie, Xiao-Yi Liu, Song-Tao Yuan, Qing-Huai Liu
AIM: To estimate the effectiveness of phacoemulsification and foldable intraocular lens (IOL) implantation combined with transpupillary silicone oil removal. METHODS: There were 168 eyes of 168 candidate patients with cataract and silicone oil-filled eyes recruited in our study. All of the patients received the intraocular silicone oil removal surgery by transpupillary drainage and cataract extraction by phacoemulsification. Then the IOL implantation were also performed through corneal incision...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29146307/long-term-visual-outcomes-and-safety-profile-of-27-gauge-pars-plana-vitrectomy-for-posterior-segment-disease
#9
M Ali Khan, Alexander Kuley, Christopher D Riemann, Maria H Berrocal, Rohit R Lakhanpal, Jason Hsu, Arunan Sivalingam, Allen C Ho, Carl D Regillo
PURPOSE: To report longer-term outcomes of 27-gauge pars plana vitrectomy (PPV) in eyes with posterior segment disease. DESIGN: Multicenter, retrospective, interventional case series. PARTICIPANTS: A total of 390 eyes of 360 patients undergoing 27-gauge PPV for a vitreoretinal surgery indication. INTERVENTION: Three-port, transconjunctival, 27-gauge PPV. MAIN OUTCOME MEASURES: Change in visual acuity (VA) and occurrence of intraoperative and postoperative complications with a minimum follow-up of 365 days...
November 13, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29121523/spectroscopic-studies-of-the-silicone-oil-impact-on-the-ophthalmic-hydrogel-based-materials-conducted-in-time-dependent-mode
#10
Kordian Chamerski, Marcin Stopa, Piotr Jelen, Magdalena Lesniak, Maciej Sitarz, Jacek Filipecki
Silicone oil is the one of the artificial materials used in vitreoretinal surgery for retinal detachment treatment. Since the silicone oil is sometimes applied along with intraocular lens (IOL) implantation the direct influence of silicone oil on the artificial implant should be taken into account. Presented study was performed in order to determine the time-dependent impact of silicone oil on hydrogel based ophthalmic materials. Two kinds of IOLs based on hydroxyethyl 2-methacrylate (HEMA) hydrogel material were immersed in silicone oil based on linear poly(dimethylsiloxane) (PDMS)...
October 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29082089/intra-ocular-lens-optical-changes-resulting-from-the-loading-of-dexamethasone
#11
José M Artigas, M Carmen García-Domene, Amparo Navea, Pablo Botella, Eduardo Fernández
To study the optical changes on hydrogel-silicone intraocular lenses (IOLs) resulting from loading them with dexamethasone. We used prototype hydrogel(pHEMA)-silicone IOLs and loaded the matrices with an anti-inflammatory drug (dexamethasone). The optical properties we analyzed experimentally were a) modulation transfer function (MTF); b) spectral transmission; c) diopter power. These determinations were performed on drug-loaded IOLs, IOLs that had released the drug, and IOLs that had not been drug-loaded. Loading a hydrogel-silicone IOL with dexamethasone results in impairment of its optical qualities, in particular its MTF and spectral transmission, but not dioptric power...
October 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29081659/successful-management-of-late-onset-streptococcus-mitis-endophthalmitis
#12
Jinmann Chon, Moosang Kim
Endophthalmitis following intraocular surgery can be devastating. This case report demonstrates successful management of late-onset Streptococcus mitis endophthalmitis treated by vitrectomy, panretinal photocoagulation (PRP) and silicone oil tamponade. A 75-year-old man presented with painful vision loss in his right eye. The patient had uneventful phacoemulsification and intraocular lens implantation in the right eye at an outside clinic 6 weeks prior. Examination disclosed hypopyon and vitritis, as well as discrete inflammatory collections in the vitreous...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29016452/intraocular-lens-position-in-combined-phacoemulsification-and-vitreoretinal-surgery
#13
Serdar Ozates, Hasan Kiziltoprak, Mustafa Koc, Mehmet Murat Uzel, Mehmet Yasin Teke
PURPOSE: To assess the decentration and angle of tilt of the intraocular lens (IOL) according to the intravitreal tamponade types used in combined phacoemulsification and vitreoretinal surgery. METHODS: This prospective and randomized clinical study involved 73 eyes of 69 patients who underwent combined vitreoretinal surgery. Eyes with intravitreal tamponades formed the study group and eyes without intravitreal tamponades formed the control group. The study group was further divided into silicone oil and gas tamponade subgroups...
October 9, 2017: Retina
https://www.readbyqxmd.com/read/28924422/femtosecond-laser-assisted-cataract-surgery-in-vitrectomized-eye-with-posterior-chamber-phakic-intraocular-lens
#14
Natalia Anisimova, Boris Malyugin, Lisa B Arbisser, Nikolay Sobolev
We describe a case of femtosecond laser-assisted cataract surgery (FLACS) in an eye with multiple comorbidities, including retinal detachment surgery, high myopia, posterior chamber phakic intraocular lens (PC pIOL) and residual, emulsified, silicone oil located in the anterior chamber. FLACS was affected by the optical blockage, but the incomplete capsular tear was recoverable. The case suggests that silicone oil bubbles concentrated at the dome of the posterior corneal surface, along with the PC pIOL optic edges and scars after corneal astigmatic relaxing incisions can lead to incomplete anterior capsulotomy...
2017: Digital Journal of Ophthalmology: DJO
https://www.readbyqxmd.com/read/28840039/outcomes-of-vitrectomy-in-pediatric-retinal-detachment-with-proliferative-vitreoretinopathy
#15
Robert Rejdak, Dominika Nowakowska, Katarzyna Wrona, Ryszard Maciejewski, Anselm G Junemann, Katarzyna Nowomiejska
AIM: To report outcomes of pars plana vitrectomy (PPV) in pediatric retinal detachment (RD) with proliferative vitreoretinopathy (PVR), complications, factors influencing the final anatomical and functional results. METHODS: Retrospective consecutive case series of 14 eyes. Average postoperative follow-up period was 34 months. RESULTS: Mean age of patients was 10 years; eleven patients (79%) were males. The most common etiology was trauma (57%), the second-myopia (36%) and one case of uveitis (7%)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28834901/outcomes-of-23-gauge-pars-plana-vitrectomy-combined-with-phacoemulsification-and-capsulotomy-without-intraocular-lens-implantation-in-rhegmatogenous-retinal-detachment-associated-with-choroidal-detachment
#16
Huiyan Xu, David Lutrin, Zhifeng Wu
Rhegmatogenous retinal detachment associated with choroidal detachment (RRDCD) is a special type of complex retinal detachment, and usually has a poor prognosis. This study aimed to assess the anatomical outcomes of 23-gauge pars plana vitrectomy (23G PPV) combined with phacoemulsification (phaco) and capsulotomy without intraocular lens (IOL) implantation in patients with RRDCD.Seventy-six consecutive patients with RRDCD, who underwent retinal repair surgery from January 2010 to December 2014, were retrospectively analyzed...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28732604/artificial-iris-implantation-in-various-iris-defects-and-lens-conditions
#17
Christian Mayer, Tamer Tandogan, Andrea E Hoffmann, Ramin Khoramnia
We describe 6 surgical techniques used to implant a silicone iris prosthesis: sector-shaped iris segments that require suturing, injector-assisted sulcus fixation, injector-assisted capsular bag fixation with an intraocular lens (IOL) and capsular tension ring, folded iris tissue implanted with a forceps and sutured to the sclera with a scleral-fixated IOL, "sandwich" or "backpack" implantation with an IOL, and open-sky implantation with a perforating keratoplasty. The results of the techniques performed in 51 patients are discussed...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28674834/intraocular-silicone-implant-to-treat-chronic-ocular-hypotony-an-in-vivo-trial
#18
Wesal Bayoudh, Dörthe Carstesen, Peter Walter, Andreas W A Weinberger
PURPOSE: The management of chronic ocular hypotony and complicated proliferative vitreoretinopathy-related retinal detachment represents a challenge. Being non-absorbable and non-biodegradable, a silicone oil implant is expected to restore the volume and the intraocular pressure of the globe, as well as to approximate the detached retina. Further advantages could be a long-term tamponade potential, absence of toxicity, and prevention of silicone oil emulsification or anterior chamber oil-prolapse...
October 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28663881/achromatic-doublet-intraocular-lens-for-full-aberration-correction
#19
Enrique J Fernandez, Pablo Artal
A doublet intraocular lens optimized for both chromatic and monochromatic aberration correction in pseudophakic eyes is presented. Ray-tracing techniques were applied to design the lens in white light within a chromatic eye model. Combinations of two materials, already commonly used in intraocular lenses, as acrylic and silicone, were used. Iterative optimization algorithms were employed to correct for longitudinal chromatic aberration, spherical aberration and off-axis aberrations within 10 degrees of visual field...
May 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28560848/advanced-silicon-chemistry-in-australia-forming-strong-links-with-asia
#20
Stephen Clarke, Kim-Anh Thi Nguyen, Elda Markovic, Neil Trout, Milena Ginic-Markovic, Janis Matisons, Michael Owen, Daniel Graiver, Agus Hadi Santosa Wargadipura, Sudirman Habibie, Dwi Gustiono, Bok Ryul Yoo, Joe Mifsud
This paper details Australian commercial and academic silicon research. Areas of interest include silicon metal, polysiloxane polymers, copolymers, cyclics, emulsions, microemulsions, silanes, silane coupling agents, sol-gel chemistry and water-treatments, porous silicon, polysiloxane degradation, silicon hydrogel contact lenses, silanolate synthesis, siloxane interfacial polymerisation, hydrosilylation, polysiloxane electrolytes for lithium ion batteries, silanes for PBX materials, octafunctionalized polyhedral oligomeric silsesquioxanes (POSS), POSS hybrids, sol-gel hydrogenation catalysts, silane modification of silica, sol-gel energy storage, silicate grout stabilisation, GeoPolymer concretes, aerogel insulating foams, "Phaco-Ersatz" Accommodating Gel-Intraocular Lens technologies...
June 1, 2017: Chemistry, An Asian Journal
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