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https://www.readbyqxmd.com/read/28103597/psychophysiological-effects-of-a-single-short-and-moderately-bright-room-light-exposure-on-mildly-depressed-geriatric-inpatients-a-pilot-study
#1
Markus Canazei, Wilfried Pohl, Kathrin Bauernhofer, Ilona Papousek, Helmut K Lackner, Harald R Bliem, Josef Marksteiner, Elisabeth M Weiss
BACKGROUND: Light interventions typically exert their mood-related effects during morning bright light exposures over several weeks. Evidence about immediate ambient room light effects on depressed individuals is still sparse. OBJECTIVE: The present study aimed at examining the acute effects of a single moderately bright room light exposure on mood, and behavioural and cardiac stress reactions of mildly depressed geriatric inpatients during a short cognitive stimulation and while resting...
January 20, 2017: Gerontology
https://www.readbyqxmd.com/read/28059301/spatial-dimming-scheme-for-optical-ofdm-based-visible-light-communication
#2
Yang Yang, Zhimin Zeng, Julian Cheng, Caili Guo
A new dimming control scheme termed spatial dimming orthogonal frequency division multiplexing (SD-OFDM) is proposed for multiple-input and multiple output OFDM based visible light communication. The basic idea of SD-OFDM is that the illumination can be represented by the number of glared light emitting diodes (LEDs) in an LED lamp. As the biasing level of LEDs does not adjust to represent the required illumination level, the proposed scheme can significantly mitigate the clipping noise compared to analogue dimming schemes...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28046516/we-ab-207a-03-a-cbct-head-scanner-for-point-of-care-imaging-of-intracranial-hemorrhage
#3
J Xu, A Sisniega, W Zbijewski, H Dang, J Stayman, X Wang, D Foos, N Aygun, V Koliatsos, J Siewerdsen
PURPOSE: This work reports the design, development, and first technical assessment of a cone-beam CT (CBCT) scanner developed specifically for imaging of acute intracranial hemorrhage (ICH) at the point of care, with target applications in diagnosis and monitoring of traumatic brain injury, stroke, and postsurgical hemorrhage. METHODS: System design employed a task-based image quality model to quantify the influence of factors such as additive noise and high-gain (HG) detector readout on ICH detectability...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045969/blue-light-filtering-spectacle-lenses-optical-and-clinical-performances
#4
Tsz Wing Leung, Roger Wing-Hong Li, Chea-Su Kee
PURPOSES: To evaluate the optical performance of blue-light filtering spectacle lenses and investigate whether a reduction in blue light transmission affects visual performance and sleep quality. METHODS: Experiment 1: The relative changes in phototoxicity, scotopic sensitivity, and melatonin suppression of five blue-light filtering plano spectacle lenses were calculated based on their spectral transmittances measured by a spectrophotometer. Experiment 2: A pseudo-randomized controlled study was conducted to evaluate the clinical performance of two blue-light filtering spectacle lenses (BF: blue-filtering anti-reflection coating; BT: brown-tinted) with a regular clear lens (AR) serving as a control...
2017: PloS One
https://www.readbyqxmd.com/read/28009794/ocular-straylight-with-different-multifocal-contact-lenses
#5
Grzegorz Łabuz, Norberto López-Gil, Thomas J T P van den Berg, Fernando Vargas-Martín
PURPOSE: Multifocal contact lenses have been growing in popularity as a modality to correct presbyopic eyes, although visual side effects such as disability glare have been reported. The objective of this study was to investigate the effect of multifocal contact lenses on disability glare by means of ocular straylight. METHODS: A prospective randomized, comparative study was performed that included 16 subjects free of ocular pathology. Straylight was measured using a commercial straylight meter with the natural and dilated pupil...
December 22, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28009399/multifocal-corneal-ablation-supracor-in-hyperopic-presbyopia-1-year-results-in-a-cross-sectional-study
#6
Torsten Schlote, Alexander Heuberger
PURPOSE: To evaluate the efficacy and safety of the multifocal excimer laser corneal ablation profile (the Supracor procedure) in hyperopic presbyopia 1 year after laser treatment. METHODS: This prospective, consecutive, one-center, cross-sectional study included 20 patients with hyperopic presbyopia 1 year after treatment with the Supracor procedure. The main outcome measures were monocular uncorrected distance visual acuity (UDVA) and uncorrected near visual acuity (UNVA), photopic contrast sensitivity (Pelli-Robson charts), patient satisfaction, and functioning at 12 months...
December 2, 2016: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28003982/assessment-of-contrast-sensitivity-loss-after-intrastromal-femtosecond-laser-and-lasik-procedure
#7
Elsa L C Mai, Ie-Bin Lian, David C K Chang
AIM: To assess the loss of contrast sensitivity (CS) function for INTRACOR or intrastromal femtosecond laser presbyopia procedure to conventional LASIK procedures. METHODS: Patients were recruited from a refractive surgery center for either INTRACOR or conventional LASIK. INTRACOR was performed on 8 eyes and LASIK was performed for 40 eyes in an overlapping period. Pre-operative evaluation and post-operative follow up for up to three months was done. Drops of CS in 4 spatial frequency (3 cpd, 6 cpd, 12 cpd and 18 cpd) right before and 3mo after the surgery were compared by Wilcoxon signed ranks test...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28003977/combination-of-toric-and-multifocal-intraocular-lens-implantation-in-bilateral-cataract-patients-with-unilateral-astigmatism
#8
Jing-Li Liang, Fang Tian, Hong Zhang, He Teng
AIM: To assess the binocular visual function in bilateral cataract patients with unilateral astigmatism after combined implantations of Toric with multifocal intraocular lens (IOL), and to compare with that of Toric and monofocal IOL implantation. METHODS: All the 30 patients with unilateral astigmatism suffered bilateral cataract were randomly divided into two groups: Toric plus multifocal IOL group and Toric plus monofocal IOL group. Uncorrected and corrected visual acuity at distance (5...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28003739/visual-aberrometric-photic-phenomena-and-patient-satisfaction-after-myopic-wavefront-guided-lasik-using-a-high-resolution-aberrometer
#9
Sarah Moussa, Alois K Dexl, Eva M Krall, Eva M Arlt, Günther Grabner, Josef Ruckhofer
PURPOSE: The purpose of this study was to evaluate the visual, refractive, and aberrometric outcomes as well as the level of patient satisfaction and photic phenomena after myopic laser in situ keratomileusis (LASIK) surgery using wavefront-guided (WFG) ablations based on measurements obtained with a high-resolution aberrometer. PATIENTS AND METHODS: This study was a prospective analysis including 253 eyes of 127 patients (aged between 19 years and 54 years) undergoing WFG LASIK using the STAR S4 IR Excimer Laser System combined with the iDesign System and iFS Femtosecond Laser...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27994391/causes-of-phakic-implantable-collamer-lens-explantation-exchange-at-king-khaled-eye-specialist-hospital
#10
Nasser A AlSabaani, Ashley Behrens, Sabah Jastanieah, Salem Al Malki, Mohanna Al Jindan, Saeed Al Motowa
PURPOSE: The purpose of this study is to evaluate the causes of phakic implantable collamer lens (ICL) explantation/exchange at an eye hospital in Saudi Arabia. MATERIALS AND METHODS: A retrospective chart review was performed for patients who underwent ICL implantation from 2007 to March 2014 and data were collected on cases that underwent ICL explantation. RESULTS: Of the 787 ICL implants, 30 implants (3.8% [95% confidence interval 2.6%; 5...
October 2016: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/27982214/coexistence-of-optic-pit-and-coloboma-of-iris-lens-and-choroid-a-case-report
#11
Ramazan Özelce, Vuslat Gürlü, Hande Güçlü, Sadık Altan Özal
A 42-year-old woman was admitted to our clinic with a complaint of glare in both eyes. Biomicroscopic examination of both the eyes revealed iris and lens colobomas in the inferior quadrant. Fundus examination of the right eye revealed an oval and gray inferotemporal optic pit and two choroid colobomas in the inferior quadrant. In the left eye, two choroid colobomas were detected that were inferior to the optic nerve head. Furthermore, a 21-year-old man presented to our clinic for a routine ophthalmologic examination...
September 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/27943250/multifocal-versus-monofocal-intraocular-lenses-after-cataract-extraction
#12
REVIEW
Samantha R de Silva, Jennifer R Evans, Varo Kirthi, Mohammed Ziaei, Martin Leyland
BACKGROUND: Good unaided distance visual acuity (VA) is now a realistic expectation following cataract surgery and intraocular lens (IOL) implantation. Near vision, however, still requires additional refractive power, usually in the form of reading glasses. Multiple optic (multifocal) IOLs are available which claim to allow good vision at a range of distances. It is unclear whether this benefit outweighs the optical compromises inherent in multifocal IOLs. OBJECTIVES: To assess the visual effects of multifocal IOLs in comparison with the current standard treatment of monofocal lens implantation...
12, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27939562/results-in-combined-cataract-surgery-with-prosthetic-iris-implantation-in-patients-with-previous-iridocyclectomy-for-iris-melanoma
#13
Michael E Snyder, Robert H Osher, Trisha M Wladecki, Mauricio A Perez, James J Augsburger, Zélia Corrêa
PURPOSE: To present visual and functional results following implantation of iris prosthesis combined with cataract surgery in eyes with previous iridocyclectomy for iris melanoma or presumed iris melanoma. DESIGN: Retrospective non-comparative case series METHODS: Sixteen patients (16 eyes) with iris defects after iridocyclectomy for iris melanoma in 15 cases and iris adenoma in 1 case underwent prosthetic iris device implantation surgery. Prosthetic iris implantation was combined with phacoemulsification and intraocular lens (IOL) implantation...
December 6, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27924753/referral-criteria-for-outpatient-specialty-palliative-cancer-care-an-international-consensus
#14
REVIEW
David Hui, Masanori Mori, Sharon M Watanabe, Augusto Caraceni, Florian Strasser, Tiina Saarto, Nathan Cherny, Paul Glare, Stein Kaasa, Eduardo Bruera
Although outpatient specialty palliative-care clinics improve outcomes, there is no consensus on who should be referred or the optimal timing for referral. In response to this issue, we did a Delphi study to develop consensus on a list of criteria for referral of patients with advanced cancer at secondary or tertiary care hospitals to outpatient palliative care. 60 international experts (26 from North America, 19 from Asia and Australia, and 11 from Europe) on palliative cancer care rated 39 needs-based criteria and 22 time-based criteria in three iterative rounds...
December 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27919635/a-critical-assessment-on-kidney-allocation-systems
#15
REVIEW
Richard N Formica
The kidney allocation system that took effect on December 4, 2014 represents a significant improvement over the prior approach. It seeks to improve outcomes by longevity matching - pairing kidneys expected to function the longest with recipients expected to live the longest. It addresses the biological barriers faced by highly sensitized patients in an evidence based fashion and it begins to introduce the concept of medical need into kidney allocation by crediting time from the starting dialysis to a patient's waiting time...
October 8, 2016: Transplantation Reviews
https://www.readbyqxmd.com/read/27908604/compatibility-of-phospholipid-liposomal-spray-with-silicone-hydrogel-contact-lens-wear
#16
Michael T M Wang, Kalaivarny Ganesalingam, Chee Seang Loh, Trisha Alberquerque, Suhaila Al-Kanani, Stuti L Misra, Jennifer P Craig
PURPOSE: To assess the effects of two weeks of regular phospholipid liposomal spray application on lipid layer grade, tear film stability, subjective comfort, visual acuity, and lipid deposition in silicone hydrogel contact lens wearers. METHODS: Thirty-one existing contact lens wearers were enrolled and fitted with two week planned replacement silicone hydrogel contact lenses (Acuvue(®) Oasys(®)) in a prospective, randomized, paired-eye, investigator-masked trial...
February 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/27900683/constructing-and-screening-a-metagenomic-library-of-a-cold-and-alkaline-extreme-environment
#17
Mikkel A Glaring, Jan K Vester, Peter Stougaard
Natural cold or alkaline environments are common on Earth. A rare combination of these two extremes is found in the permanently cold (less than 6 °C) and alkaline (pH above 10) ikaite columns in the Ikka Fjord in Southern Greenland. Bioprospecting efforts have established the ikaite columns as a source of bacteria and enzymes adapted to these conditions. They have also highlighted the limitations of cultivation-based methods in this extreme environment and metagenomic approaches may provide access to novel extremophilic enzymes from the uncultured majority of bacteria...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27893066/symptoms-and-satisfaction-of-patients-in-the-patient-reported-outcomes-with-laser-in-situ-keratomileusis-prowl-studies
#18
Malvina Eydelman, Gene Hilmantel, Michelle E Tarver, Elizabeth M Hofmeister, Jeanine May, Keri Hammel, Ron D Hays, Frederick Ferris
Importance: Patient-reported outcomes should be collected using validated questionnaires prior to and following laser in situ keratomileusis (LASIK) surgery. Objective: To report the frequency of patient-reported visual symptoms, dry eye symptoms, satisfaction with vision, and satisfaction with LASIK surgery in the Patient-Reported Outcomes With LASIK (PROWL) studies. Design, Setting, and Participants: The PROWL-1 and PROWL-2 studies were prospective, observational studies conducted from September 13, 2011, to June 27, 2014...
January 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27893063/assessment-of-the-psychometric-properties-of-a-questionnaire-assessing-patient-reported-outcomes-with-laser-in-situ-keratomileusis-prowl
#19
Ron D Hays, Michelle E Tarver, Karen L Spritzer, Steve Reise, Gene Hilmantel, Elizabeth M Hofmeister, Keri Hammel, Jeanine May, Frederick Ferris, Malvina Eydelman
Importance: Patient-reported outcome (PRO) measures for laser in situ keratomileusis (LASIK) are needed. Objective: To develop PRO measures to assess satisfaction, eye-related symptoms, and their effect on functioning and well-being following LASIK based on patient and expert input. Design, Setting, and Participants: The Patient-Reported Outcomes With LASIK (PROWL) studies were prospective observational studies of patients undergoing LASIK surgery for myopia, hyperopia, or astigmatism...
January 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27890547/a-delphi-study-to-develop-practical-diagnostic-guidelines-for-visual-stress-pattern-related-visual-stress
#20
Bruce J W Evans, Peter M Allen, Arnold J Wilkins
PURPOSE: Visual stress (VS) is characterised by symptoms of visual perceptual distortions and eyestrain when viewing text, symptoms that are alleviated by individually prescribed coloured filters. A recent review supports the existence of VS and its treatment, but noted that controversy remains, in part due to inconsistencies in the diagnosis of the condition. The present paper reviews the diagnostic criteria for VS in the literature and reports a Delphi analysis of the criteria currently used in clinical practice...
November 24, 2016: Journal of Optometry
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