Intraocular lens silicon

BACKGROUND: Intraocular lens (IOL) implantation is required after vitrectomy combined with cataract surgery in diabetic retinopathy patients. However, the question of whether an IOL should be implanted in stage I after vitrectomy or stage II during silicone oil filling has been controversial, and there has been no systematic review of this clinical issue. METHODS: WanFang, SinoMed CNKI, VIP, PubMed, Embase, and Cochrane Library databases were systematically searched for relevant studies...

This report describes a case of poor intraocular pressure control after the encircling procedure for traumatic retinal detachment. We inserted an Ahmed Glaucoma Valve Implant® (AGVI) with partial sponge resection and obtained good results. The results are reported here. An 11-year-old boy had a traumatic globe rupture in the right eye (OD). Corneo-scleral repair and lens extraction were performed on the injured eye. About one month after the injury, the intraocular pressure (IOP) of OD had increased to 25 mmHg...

PURPOSE: To evaluate a single surgeon's experience with an automated preloaded intraocular lens (IOL) delivery system and a nonpreloaded system. METHODS: This was a prospective, observational case series. Phacoemulsification was performed under topical anesthesia by creating a temporal clear corneal incision. Patients were consecutively assigned to either the Clareon group (n = 50; the IOL was injected into the capsular bag by using an automated injector system) or the AcrySof group (n = 50; the IOL was injected into the capsular bag by using a conventional injector system)...

INTRODUCTION: This retrospective study aimed to assess the effectiveness of using MicroPulse transscleral cyclophotocoagulation (µP-TSCPC) in patients who had previously undergone pars plana vitrectomy (PPV), depending on the endotamponade used. METHODS: For the study, a total of 60 patients were enrolled who underwent PPV followed by tμP-TSCPC as a result of an increase in intraocular pressure (IOP) over the norm of 21 mmHg. In this group of patients, 20 received silicone oil endotamponade during PPV, 20 received sulfur hexafluoride gas SF6, and in another 20 a differentiated balanced salt solution (BSS) was used...

OBJECTIVE: The aim of this work is to evaluate the extent to which the eye's curvature deformation, due to changes in the intraocular pressure (IOP), can be directly tracked by an overlying contact lens. METHOD: In this experimental study, using 12 cadaveric eyes, the IOP was increased from 10 to 36 mmHg, while video imaging was used to capture the three experimental variations. The deformation of the bare eye was used as a control, while the deformation of an overlying silicone grided contact lens and an overlying microfluidic IOP-sensing contact lens were examined and compared...

BACKGROUND We report a rare case of unilateral Klebsiella pneumoniae endogenous endophthalmitis with retinal necrosis secondary to acute prostatitis and its clinical management. CASE REPORT A 72-year-old immunocompetent male presented with high fever and gastrointestinal and genitourinary symptoms. He was diagnosed with acute prostatitis, hospitalized, and started on a systemic antibiotic. After 3 days, he experienced floaters in the right eye with subsequent loss of vision. He was referred to the ophthalmology department, where endophthalmitis was diagnosed...

Purpose: To report the unexpected finding of a membrane resembling a second anterior lens capsule during cataract surgery after previous pars plana vitrectomy (PPV) with silicone oil tamponade for retinal detachment. Observations: A 26-year-old male with a history of two retinal detachment repairs of the right eye over a 5-month period, presented with decreased vision. The first retinal detachment repair was performed with a 23-gauge PPV and the second with a 25-gauge PPV, scleral buckle and placement of silicone oil...

OBJECTIVES: To assess the impact of national affluence on the extent of prescribing of various types of soft contact lenses. METHODS: Using information derived from a large bank of contact lens prescribing data, the relationship between the percentage prescribing of daily disposable, toric, silicone hydrogel, and multifocal contact lenses versus the gross domestic product at purchasing parity per capita (GDP [PPP]) was determined for all countries in which contact lens prescribers returned survey forms relating to greater than 100 contact lens fits between 2017 and 2021, inclusive...

AIM: To report the postoperative axial length (AL) changes in rhegmatogenous retinal detachment combined with choroidal detachment (RRD-CD) patients. METHODS: The medical records of 97 consecutive patients from January 2015 to December 2018 were reviewed. Patients included were divided into RRD-CD and RRD only groups. All patients had received AL measurements before pars plana vitrectomy (PPV) and before silicone oil removal (SOR). The changes in AL of the two groups were compared...

PURPOSE: To provide a relationship between materials developed for silicone hydrogel contact lenses and multipurpose care solutions to identify improvements in wettability, for prelens noninvasive break-up time and subjective score. METHODS: This systematic review was completed according to the updated PRISMA 2020 statement recommendations and followed the explanation and elaboration guidelines. The PubMed, Web of Science, and Scopus scientific literature databases were searched from January 2000 to November 2021...

PURPOSE: To describe results in two cases of a dislocated silicone plate haptic intraocular lens (SPHIOL) managed with vitrectomy and repositioning with scleral suture fixation. METHODS: small case series. RESULTS: Two patients present with dislocated SPHIOL underwent a 23-gauge vitrectomy with a "handshake" maneuver to pass a 9-0 prolene suture through the positioning holes to allow scleral fixation. Best corrected visual acuity was returned to predislocation level 2 and 8 months after the PPV...

PURPOSE: To describe the use of the amniotic membrane for the repair of the exit wound of a perforating injury involving the retina and the choroid. METHODS: Case report. RESULTS: A 46-year-old man presented one day after a perforating ocular injury with an exit wound close to the inferior temporal retinal vascular arcade. The next day, the patient underwent a combined vitrectomy and phacoemulsification with intraocular lens implantation. During vitrectomy, a retinochoroidectomy was performed at the exit wound and the internal limiting membrane was peeled over the macula and up to the exit wound...

OBJECTIVE: To assess the effect of commonly used contact lens disinfectants against severe acute respiratory syndrome corona virus 2 (SARS-CoV-2). METHODS: The efficacy of five disinfectant solutions against SARS-CoV-2 was tested in the presence and absence of contact lenses (CLs). Three types of unused CLs (hard gas permeable, soft hydrogel, and soft silicone hydrogel) and worn silicone hydrogel CLs were tested. Contact lenses were infected with SARS-CoV-2 and disinfected at various times, with and without rubbing and rinsing, as per manufacturer's instructions...

Purpose: To compare the axial length (AL) obtained by A-scan biometry (PAC SCAN 300AP; Sonomed Escalon, USA) and LENSTAR-LS 900 (Haag-Streit, Koeniz, Switzerland) in silicone oil (SiO)-filled eyes. Methods: AL measurements were taken in 50 SiO-filled eyes using A-scan and LENSTAR-LS 900 before SiO removal and 1 month following SiO removal. In the subset of patients requiring intraocular lens (IOL) insertion, the predicted refraction and the refraction obtained were compared...

PURPOSE: To evaluate formulas for intraocular lens (IOL) calculation in silicone oil (SO)-filled eyes. DESIGN: Retrospective, consecutive case series. METHODS: We conducted our study at the Department of Ophthalmology, Goethe University, Frankfurt, Germany, and included SO-filled eyes that received SO removal combined with phacoemulsification and IOL implantation. Preoperative assessments included biometry (IOLMaster 700; Carl Zeiss Meditec)...

AIM: To investigate the clinical features, causative organisms and effects of timely vitrectomy and silicone oil tamponade without intraocular lens (IOL) removal in the treatment of acute-onset endophthalmitis after cataract surgery (APCE). METHODS: We retrospectively analyzed the clinical features and microbiological factors in 10 eyes of 10 patients with APCE at Tianjin Medical University General Hospital from January 2010 to December 2018. Data on the clinical features, causative organisms, visual acuity, intraocular pressure (IOP) and complications were collected...

Advances in cataract surgery have increased the demand for intraocular lens (IOL) materials. At present, the progress of IOL materials mainly contains further improving biocompatibility, providing better visual quality and adjustable ability, reducing surgical incision, as well as dealing with complications such as posterior capsular opacification (PCO) and ophthalmitis. The purpose of this review is to describe the research progress of relevant IOL materials classified according to different clinical purposes...

PURPOSE: To evaluate the outcomes and complications of simultaneous silicon oil removal (SOR) and phacoemulsification and intra ocular lens implantation. METHODS: In this retrospective non-comparative case series, the visual, refractive and anatomical outcomes of patients who underwent combined phacoemulsification/silicone oil removal (5700 centistokes) surgery between 2017 and 2019 in a single center were evaluated. RESULTS: Forty-four eyes of 44 patients (eighteen males) were included...

Postoperative endophthalmitis caused by Rothia mucilaginosa, a gram-positive, coagulase-negative Micrococcaceae of the oropharyngeal flora, is rare and all previously reported intraocular implant-related cases have resulted in evisceration. R. mucilaginosa endophthalmitis has also not been described with any glaucoma implant device. Here, the authors report a case of subacute R. mucilaginosa endophthalmitis after phacoemulsification with implantation of an intraocular lens and the iStent inject (Glaukos). The infection was managed with intravitreal antibiotic injections, pars plana vitrectomy, and intraocular lens and iStent explantations...

AIM: To evaluate the accuracy of segmented measurement of axial length (AL) in high myopia filled with silicone oil by immersion B-scan ultrasonography (immersion B-scan). METHODS: From June 2016 to June 2020, a total of 67 ultra-high myopia inpatients (67 eyes) who underwent silicone oil removal combined with cataract extraction and intraocular lens (IOL) implantation were retrospectively enrolled. The preoperative axial length (AL) of 31 patients with severe cataract were segmented measured using immersion B-scan (B-scan group) and another 36 patients with mild or moderate cataract were measured using IOLMaster 500 (IOLMaster group)...