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Intraocular lens silicon

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https://www.readbyqxmd.com/read/29016452/intraocular-lens-position-in-combined-phacoemulsification-and-vitreoretinal-surgery
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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...
July 3, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28663881/achromatic-doublet-intraocular-lens-for-full-aberration-correction
#7
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
#8
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
https://www.readbyqxmd.com/read/28540021/minimally-invasive-surgery-for-the-removal-of-posterior-intraocular-foreign-bodies
#9
Jesus Hernan Gonzalez-Cortes, Yunuen Bages-Rousselon, Jesus Emiliano Gonzalez-Cantu, Jesus Mohamed-Hamsho
This is a prospective clinical assay that included six patients who were diagnosed with penetrating corneal injury, traumatic cataract, and posterior segment intraocular foreign body (IOFB). Following anterior segment repair and extraction of traumatic cataract by clear cornea phacoemulsification, a standard 25-gauge transconjunctival pars plana vitrectomy was performed to find and release the IOFB. With active suction using a 25-gauge silicone tipped cannula, the foreign body was retrieved and safely placed in the anterior chamber...
April 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28499054/manual-removal-of-intraocular-lens-silicone-oil-droplets-and-dystrophic-calcifications-using-a-nitinol-loop-a-case-series
#10
Kareem Moussa, Theodore Leng, Julius T Oatts, Robert B Bhisitkul, David G Hwang, Jay M Stewart
Deposition of dystrophic calcifications on the posterior surface of silicone intraocular lenses (IOLs) has been reported in patients with asteroid hyalosis. Accumulation of silicone oil droplets on the posterior surface of silicone IOLs in silicone-filled eyes has also been reported. Recently, a novel technique to manually remove dystrophic calcifications using a nickel titanium loop (Finesse Flex Loop; Alcon, Fort Worth, TX) was described, obviating the need for IOL exchange. Here, the authors report their outcomes with this technique in five eyes with IOL dystrophic calcifications as well as one eye with IOL silicone oil droplet accumulation...
May 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28487797/echographic-evaluation-of-a-subconjunctival-cystic-lesion
#11
Maddalena De Bernardo, Gennarfrancesco Iaccarino, Valeria Russo, Nicola Rosa
Migration of intraocular silicone oil, used in the treatment of complicated retinal detachment, has been rarely described, but when it happens it can arise with a differential diagnosis with scleral buckling extrusion, tumor, dermoid, ocular cysticercosis, and abscess. The presence of silicone oil in the eye gives very ugly echographic pictures, but these kinds of pictures can be very useful in making a differential diagnosis in the above-mentioned cases. A 39-year-old white female complained of the presence of conjunctival hyperemia and tearing in the right eye (RE); her visual acuity was hand motion, and the intraocular pressure was 14 mmHg...
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/28445869/silicone-oil-related-visual-loss
#12
Hamouda Hamdy Ghoraba, Adel Galal Zaky, Mohamed Amin Heikal, Emad Eldin Mohamed Elgemai, Haithem Mamoun Abd Al Fatah
BACKGROUND: Silicone oil (SO) is used as an intravitreal tamponade agent in vitreoretinal surgery for rhegmatogenous retinal detachment (RRD) complicated by proliferative vitreoretinopathy or with large, multiple retinal tears. Usually, SO is left in the eye for at least 3 months. Although its use can lead to well-known complications, intraocular SO is generally well tolerated. Some studies have reported unexpected central vision loss after SO use or removal. OBJECTIVE: To investigate and analyze the reason for visual loss after the use or removal of intraocular SO in patients who underwent vitrectomy surgeries for RRD...
2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28441071/efficacy-and-safety-of-23-gauge-pars-plana-vitrectomy-silicone-oil-tamponade-combination-for-treatment-of-pediatric-post-traumatic-endophthalmitis
#13
Wei Jin, Yaopeng Xu, Wenjun Wang, Yiqiao Xing, Anhuai Yang
PURPOSE: To determine (i) the etiology, epidemiology, mechanism of injury, and risk factors associated with open globe injuries (OGIs) in children and (ii) visual outcomes of pediatric patients with post-traumatic endophthalmitis following 23-gauge pars plana vitrectomy (PPV) combined with silicone oil tamponade (SOT). METHODS: A total of 107 consecutive patients, <15 years of age, who had been diagnosed with post-traumatic endophthalmitis between September 2009 and October 2015, were included in this 6-year retrospective study...
August 2017: Current Eye Research
https://www.readbyqxmd.com/read/28393030/surgical-treatment-and-visual-outcomes-of-cataract-with-persistent-hyperplastic-primary-vitreous
#14
Li Li, Da-Bei Fan, Ya-Ting Zhao, Yun Li, Fang-Fei Cai, Guang-Ying Zheng
AIM: To evaluate the surgical treatment and visual outcomes of eyes with cataract and persistent hyperplastic primary vitreous (PHPV). METHODS: This retrospective study included patients with cataract and PHPV treated with various strategies. Anterior PHPV was treated using phacoemulsification with underwater electric coagulation on posterior capsule neovascularization, posterior capsulotomy, anterior vitrectomy, and intraocular lens (IOL) implantation. Posterior PHPV was treated with lensectomy, posterior vitrectomy, retinal photocoagulation, and IOL implantation or silicone oil tamponade...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28302249/opacification-of-a-hydrophilic-acrylic-intraocular-lens
#15
Yezhen Yang, Manqiang Peng, Yiqin Duan, Xuetao Huang, Kuanshu Li, Ding Lin
Opacification of a hydrophilic acrylic intraocular (IOL) lens is a rare phenomenon. We herein report a case of a 57-year man complaining of decreased vision at left eye for the last 4 months. He had undergone phacoemulsification with IOL implantation 2 years back. IOL opacification was observed through slit-lamp. IOL exchange was carried out. The exchanged IOL and a new lens of the same model were sent to laboratory for pathologic analysis. Confocal microscopy showed uniformly distributed granules from the surface to 80 µm internal surface...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28003789/an-after-after-cataract-a-curious-case-of-visual-axis-re-opacification
#16
Jay Kalliath, Gaurav Prakash, Kavitha Avadhani, Anitha Shakuntala
Posterior capsular opacification (PCO) is common after cataract surgery. Recurrence is very rare after a successful Yttrium aluminium-garnet (YAG) capsulotomy in adults. We report a case of visual axis re-opacification after a successful YAG capsulotomy for PCO in an adult. A 60-year male underwent phacoemulsification with +20.0 D acrylic hydrophobic intraocular lens implantation and silicon oil removal (SOR) five months after a successful retinal detachment repair. He underwent a capsulotomy after two months of surgery; however, the visual axis re-opacified after three more months...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/27999127/bilateral-choroidal-detachment-with-exudative-retinal-detachment-in-a-patient-with-septicaemia
#17
Padmaja Kumari Rani, Vikas Ambiya, Sirisha Senthil, Subhadra Jalali
We present a case of bilateral choroidal and exudative retinal detachment with hypotony in a patient with septicaemia. Our patient after initial hospitalisation was treated by the local ophthalmologist as a case of sterile pan uveitis with systemic and topical steroids that did not have any effect. Our patient responded well to timely surgical intervention of choroidal drainage and vitrectomy with silicone oil tamponade followed by steroids and antibiotics. Cataract progression in both eyes occurred due to hypotony, inflammation, use of steroids and the vitreous surgery...
December 20, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27843234/progressive-keratoconus-retinal-detachment-and-intracorneal-silicone-oil-with-obsessive-compulsive-eye-rubbing
#18
Kartik Panikkar, George Manayath, Revathi Rajaraman, Veerappan Saravanan
An 18-year-old boy with an obsessive-compulsive disorder of eye rubbing presented with forme fruste keratoconus (KC) and posterior subcapsular cataracts. After evaluation, he underwent phacoemulsification in his left eye with intraocular lens implantation. The aggressive eye rubbing, however, aggravated the rapid progression to established KC, and further acute corneal hydrops within 3 months. Within the next 3 months, the eye rubbing precipitated rhegmatogenous retinal detachments (RDs) in both eyes. Furthermore, after undergoing a combined cataract and RD surgery with belt buckling and silicone oil endotamponade in his right eye, the repeated eye rubbing caused extrusion of the implanted silicone oil into the subconjunctival space and within the corneal stroma...
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27738893/imaging-characteristics-of-the-postoperative-globe-a-pictorial-essay
#19
REVIEW
Yusuke Ito, Ikuo Yamazaki, Yoichi Kikuchi, Eri O'uchi, Toshihiro O'uchi, Hiroaki Kato, Kazuki Hotta
Recognizing imaging characteristics after ophthalmic surgery is necessary for radiologists to prevent misdiagnosis. We review typical appearances of intraorbital implanted devices and materials on CT and MRI with demonstration of the common surgical procedures. EX-PRESS glaucoma filtration devices appear as punctate areas of metal attenuation on CT and are typically placed at the corneoscleral junction. The imaging manifestations after cataract extraction are absence of the native lens of ovoid mass and the intraocular lens with high attenuation on CT and low signal intensity on MRI...
December 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27526710/refractive-shift-of-silicone-oil-tamponade-in-pseudophakic-eye
#20
Wei Fang, Jiuke Li, Xiaohong Jin, Jing Zhai, Yuanmin Dai, Yumin Li
BACKGROUND: Refraction change of silicone oil (SO) tamponade in phakic and aphakic eye has been studied thoroughly; however, it is rarely studied in pseudophakic eye. In this paper we aimed to deduce a theoretical formula predicting refractive shift of silicone oil tamponade in pseudophakic eye and compared it with clinical findings. METHOD: A theoretical formula was deduced through strict geometric optical principles under the Helmholtz Schematic eye model. Pre/postoperative refractive status of patients who previously underwent phacoemulsification, intraocular lens (IOL) implant, vitrectomy, SO tamponade and required SO extraction was studied...
August 16, 2016: BMC Ophthalmology
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