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https://www.readbyqxmd.com/read/28606456/extended-depth-of-focus-contact-lenses-vs-two-commercial-multifocals-part-1-optical-performance-evaluation-via-computed-through-focus-retinal-image-quality-metrics
#1
Ravi C Bakaraju, Klaus Ehrmann, Arthur Ho
PURPOSE: To compare the computed optical performance of prototype lenses designed using deliberate manipulation of higher-order spherical aberrations to extend depth-of-focus (EDOF) with two commercial multifocals. METHODS: Emmetropic, presbyopic, schematic eyes were coupled with prototype EDOF and commercial multifocal lenses (Acuvue Oasys for presbyopia, AOP, Johnson & Johnson & Air Optix Aqua multifocal, AOMF, Alcon). For each test configuration, the through-focus retinal image quality (TFRIQ) values were computed over 21 vergences, ranging from -0...
June 9, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28604979/femtosecond-laser-assisted-cataract-in-vitreoretinal-surgery
#2
Stanislao Rizzo, Daniela Bacherini, Francesco Faraldi, Marco Pellegrini, Cesare Mariotti
PURPOSE: To assess the safety and surgical results of femtosecond laser-assisted phacovitrectomy. METHODS: Fifteen patients over 50 years of age with coexisting vitreoretinal pathologies and cataract underwent combined femtosecond laser-assisted cataract extraction and sutureless 25-G and 27-G vitreoretinal surgery. RESULTS: The indication for surgery was macular hole in 6 patients, epiretinal membrane in 6, vitreous hemorrhage in 2, and retinal detachment in 1...
June 2, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28602326/capsular-bag-fixated-and-ciliary-sulcus-fixated-intraocular-lens-centration-after-supplementary-intraocular-lens-implantation%C3%A2-in-the-same-eye
#3
Franz Prager, Michael Amon, Joerg Wiesinger, Barbara Wetzel, Guenal Kahraman
PURPOSE: To assess capsular bag and sulcus intraocular lens (IOL) centration in eyes that had implantation of a sulcus-fixated supplementary IOL anterior to a preexisting capsular bag IOL. SETTING: Academic Teaching Hospital of St. John, Vienna, Austria. DESIGN: Retrospective case series. METHODS: A sulcus-fixated supplementary IOL (Sulcoflex) was implanted anterior to a preexisting capsular bag IOL. The geometric center of preexisting capsular bag IOLs and newly implanted sulcus-fixated IOLs was evaluated at least 12 months postoperatively and in relation to the geometric center of the pupil and limbus...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28592226/removal-of-sulfate-and-heavy-metals-by-sulfate-reducing-bacteria-in-an-expanded-granular-sludge-bed-reactor
#4
Zhuxiang Liu, Lihua Li, Zhaoyang Li, Xiangrong Tian
The objective of this study is to utilize an expanded granular sludge bed reactor for removing heavy metals and sulfate from synthetic acid-mine drainage (AMD) using sewage sludge fermentation centrate as the substrate. The reactor was bioaugmented with an enriched consortium of sulfate-reducing bacteria (SRB). The bioreactor performance was studied with different chemical oxygen demand [Formula: see text] ratios, liquid upflow velocity (Vup), hydraulic retention time (HRT) and influent pH. The highest COD, sulfate and heavy metal removal efficiencies were achieved at a [Formula: see text] ratio of 1...
June 20, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28573991/surgical-refixation-of-posteriorly-dislocated-intraocular-lens-with-scleral-tuck-technique
#5
Pukhraj Rishi, Ekta Rishi, Aditya Maitray
PURPOSE: To report the outcomes of surgical refixation of posteriorly dislocated intraocular lens (IOL) using scleral-tuck method, and to compare the "scleral groove" and the "scleral flap" techniques used. STUDY DESIGN: Single-center, retrospective, interventional, comparative study. METHODS: Medical records of patients undergoing closed globe scleral refixation of posteriorly dislocated posterior chamber IOL (PCIOLs) by scleral-tuck method using two different techniques ("scleral groove" vs...
May 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28538612/scleral-contact-lenses-in-an-academic-oculoplastics-clinic-epidemiology-and-emerging-considerations
#6
Harinder S Chahal, Marcela Estrada, Christine W Sindt, Jacob A Boehme, Mark A Greiner, Jeffrey A Nerad, Keith D Carter, Richard C Allen, Erin M Shriver
PURPOSE: To describe the role and efficacy of scleral contact lenses (SCLs) in the treatment of progressive keratopathy in patients who have undergone periocular surgical procedures, to investigate the financial impact of these surgical interventions, and to demonstrate the role of oculoplastic surgery in improving scleral contact lens fit. METHODS: A retrospective medical record review was performed to identify patients who both received SCLs and were examined by the oculoplastics service at the University of Iowa between January 1990 and December 2015...
May 22, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28512581/refractive-lens-exchange-combined-with-primary-posterior-vitrectorhexis-in-highly-myopic-patients
#7
Tarek A Mohamed, Wael Soliman, Dalia M El Sebaity, Ahmed M Fathalla
Purpose. To evaluate efficacy and safety of primary vitrectorhexis for posterior capsulotomy in highly myopic patients undergoing refractive lens exchange. Methods. The study is a prospective nonrandomized interventional study. The study comprised 60 eyes of 60 myopic patients. All patients underwent refractive lens exchange (RLE) and foldable IOL implantation combined with primary posterior capsulotomy. We used a 23-gauge vitrectomy probe for the creation of the posterior capsule opening. We followed the patients for one year...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503438/comparison-of-visual-effects-of-fs-lasik-for-myopia-centered-on-the-coaxially-sighted-corneal-light-reflex-or-the-line-of-sight
#8
Jing Zhang, Shi-Sheng Zhang, Qin Yu, Jing-Cai Lian
AIM: To compare visual quality after femtosecond laser in situ keratomileusis (FS-LASIK), between the coaxially sighted corneal light reflex (CSCLR) group and conventional ablation line of sight (LOS) group. METHODS: In total, 243 eyes (122 patients) were treated with centration on the CSCLR (visual axis) and 238 eyes (119 patients) treated with centration on the pupil center (LOS). Postoperative outcomes [uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA)], safety index, efficacy index, refractive outcome, ablation center distance from the visual axis, corneal high-order aberrations, subjective discomfort glare and shadowing incidence rate, and contrast sensitivity at 1, 3, and 6mo were measured and compared...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28501189/high-selective-potentiometric-sensor-for-determination-of-nanomolar-con-centration-of-cu-ii-using-a-polymeric-electrode-modified-by-a-graphene-7-7-8-8-tetracyanoquinodimethane-nanoparticles
#9
Magdalena Pięk, Katarzyna Fendrych, Joanna Smajdor, Robert Piech, Beata Paczosa-Bator
In this paper we present several possibilities for modification of the all-solid-state copper(II)-selective electrodes in order to obtain high stability and selectivity potentiometric sensor signal. The copper(II)-selective electrodes were modified in a simple way by introducing solid contact layer based on graphene or graphene oxide, 7,7,8,8-tetracyanoquinodimethane or its copper salt. Each of electrodes shown a Nernstian response, wide linear range of Cu(2+) concentration and a low detection limit. Nevertheless, some differences between the groups of electrodes have been noticed and resulted from application of intermediate layers of various compositions...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28486721/topography-guided-lasik-versus-small-incision-lenticule-extraction-smile-for-myopia-and-myopic-astigmatism-a-randomized-prospective-contralateral-eye-study
#10
Anastasios John Kanellopoulos
PURPOSE: To compare safety and efficacy of topography-guided LASIK and contralateral eye SMILE for myopia and myopic astigmatism correction. METHODS: This prospective, randomized contralateral eye study included 44 eyes of 22 patients with bilateral myopia or myopic astigmatism. Treated eyes were divided into two groups: 22 eyes were treated with topography-guided LASIK and the fellow eye of each patient was treated with SMILE. The following parameters were evaluated preoperatively and up to 3 months postoperatively: uncorrected distance vision acuity (UDVA), corrected distance vision acuity (CDVA), refractive error, corneal keratometry, contrast sensitivity, and Objective Scatter Index...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28481833/air-pump-assisted-graft-centration-graft-edge-unfolding-and-graft-uncreasing-in-young-donor-graft-pre-descemet-endothelial-keratoplasty
#11
Soosan Jacob, Smita Narasimhan, Amar Agarwal, Athiya Agarwal, Saijimol A I
PURPOSE: To assess an air pump-assisted technique for graft centration, graft edge unfolding, and graft uncreasing while performing pre-Descemet endothelial keratoplasty (PDEK) using young donor grafts. METHODS: Continuous pressurized air infusion was used for graft centration, graft edge unfolding, and graft unwrinkling. RESULTS: Ten eyes of 10 patients underwent PDEK with donors aged below 40 years. In all eyes, the donor scrolled into tight scrolls...
May 3, 2017: Cornea
https://www.readbyqxmd.com/read/28457613/flanged-intrascleral-intraocular-lens-fixation-with-double-needle-technique
#12
Shin Yamane, Shimpei Sato, Maiko Maruyama-Inoue, Kazuaki Kadonosono
PURPOSE: To report the clinical outcomes of a new technique for transconjunctival intrascleral fixation of an intraocular lens (IOL). DESIGN: Prospective, noncomparative, interventional case series. PARTICIPANTS: One hundred eyes of 97 consecutive patients with aphakia, dislocated IOL, or subluxated crystalline lens who underwent posterior chamber sutureless implantation of an IOL were studied. METHODS: Two angled incisions parallel to the limbus were made by 30-gauge thin-wall needles...
April 27, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28452772/electrochemically-assisted-ammonia-recovery-from-wastewater-using-a-floating-electrode
#13
Tim H Muster, Johannes Jermakka
This work presents and explores a novel methodology for the removal and recovery of ammonia from wastewater based upon two mechanisms: electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism. Recovery of ammonia is enabled by placing a porous cathodic electrode at the wastewater-air interface. In this configuration, the cathode creates local alkalinity and an electric field that draws ammonium ions towards the wastewater-air interface, resulting in near-linear reductions of dissolved ammonium irrespective of concentration...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28439977/method-of-locating-the-visual-axis-objectively
#14
Vasyl Molebny
PURPOSE: To locate the visual axis of the eye objectively. METHOD: Based on three-beam scanning laser radar microprofilometry, a technique is proposed to objectively locate the visual axis of the eye. The laser beam consists of three components, two of them being shifted relatively to the central one by differing frequencies, filtered in spatially orthogonal directions. The centre of the foveola is defined as the crossing of steepest inclinations determined in the specific beam positions on the trajectory of scanning...
May 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28422822/intraoperative-centration-during-small-incision-lenticule-extraction-smile
#15
John X Wong, Elizabeth P Wong, Hla M Htoon, Jodhbir S Mehta
To evaluate intraoperative decentration from pupil center and kappa intercept during small incision lenticule extraction (SMILE) and its impact on visual outcomes.This was a retrospective noncomparative case series. A total of 164 eyes that underwent SMILE at the Singapore National Eye Center were included. Screen captures of intraoperative videos were analyzed. Preoperative and 3 month postoperative vision and refractive data were analyzed against decentration.The mean preoperative spherical equivalent (SE) was -5...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28413409/self-optical-coherence-tomography-and-angiography
#16
Ahmad M Mansour
PURPOSE: To present a new concept of self-optical coherence tomography (OCT) and self-OCT angiography. METHODS: The operator sits in the patient seat and manipulates the instrument body via the joystick with the dominant hand, while the dominant index is ready to press the capture button and while focusing on the fixation target. One senior ophthalmologist judged various OCT machines for ease of self-scan during a major ophthalmic convention. Separately, self-scans were also captured using a single OCT machine by one senior ophthalmologist and 5 junior optometrists and the scans were analyzed for both centration and image quality value (IQV), and compared to regular scans done by an operator...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28410709/suture-guided-sulcus-implantation-of-a-single-piece-foldable-acrylic-intraocular-lens-after-posterior-capsule-rupture
#17
Harinder Singh Sethi, Mayuresh P Naik
We describe a technique for suture-guided sulcus implantation of a foldable acrylic posterior chamber IOL (PC IOL). A 10-0 monofilament nylon suture is used to control insertion of the PC IOL over the ciliary sulcus and enable safe retrieval if the PC IOL drops during insertion, stabilization, or centration. In this technique, the 10-0 monofilament nylon suture acts as a guy rope to hold onto the PC IOL, enabling the surgeon to inject the IOL into the sulcus, unfold it in the iris plane, dial it in the appropriate meridian, and stabilize it...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28396804/impact-of-treatment-decentration-on-higher-order-aberrations-after-smile
#18
Ying Yu, Wenwen Zhang, Xinliang Cheng, Jianru Cai, Hui Chen
Purpose. To evaluate decentration following femtosecond laser small incision lenticule extraction (SMILE) and sub-Bowman keratomileusis (SBK) and its impact on higher-order aberrations (HOAs). Methods. Prospective, nonrandom, and comparison study. There were 96 eyes of 52 patients who received SMILE and 96 eyes of 49 patients who received SBK in this study. Decentration was calculated 6 months after surgery with Pentacam. HOAs and visual acuity after the surgery were examined for patients in both groups before and 6 months after surgery...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28366369/intraindividual-comparison-between-femtosecond-laser-assisted-and-conventional-cataract-surgery
#19
Anna S Mursch-Edlmayr, Matthias Bolz, Nikolaus Luft, Michael Ring, Thomas Kreutzer, Christoph Ortner, Matthias Rohleder, Siegfried G Priglinger
PURPOSE: To compare the safety and efficacy between femtosecond laser-assisted cataract surgery using the Victus laser system and conventional cataract surgery. SETTING: Department of Ophthalmology, Kepler University Hospital, Linz, Austria. DESIGN: Prospective randomized case series. METHODS: Both eyes of patients with age-related cataract were randomized to conventional cataract surgery or femtosecond laser-assisted cataract surgery, both with intraocular lens (IOL) implantation...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28364634/isolation-of-a-bacterial-strain-acinetobacter-sp-from-centrate-wastewater-and-study-of-its-cooperation-with-algae-in-nutrients-removal
#20
Hui Liu, Qian Lu, Qin Wang, Wen Liu, Qian Wei, Hongyan Ren, Caibing Ming, Min Min, Paul Chen, Roger Ruan
Algae were able to grow healthy on bacteria-containing centrate wastewater in a pilot-scale bioreactor. The batch experiment indicated that the co-cultivation of algae and wastewater-borne bacteria improved the removal efficiencies of chemical oxygen demand and total phosphorus in centrate wastewater to 93.01% and 98.78%, respectively. A strain of beneficial aerobic bacteria, Acinetobacter sp., was isolated and its biochemical characteristics were explored. Synergistic cooperation was observed in the growth of algae and Acinetobacter sp...
July 2017: Bioresource Technology
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