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https://www.readbyqxmd.com/read/29035295/nighttime-foreground-pedestrian-detection-based-on-three-dimensional-voxel-surface-model
#1
Jing Li, Fangbing Zhang, Lisong Wei, Tao Yang, Zhaoyang Lu
Pedestrian detection is among the most frequently-used preprocessing tasks in many surveillance application fields, from low-level people counting to high-level scene understanding. Even though many approaches perform well in the daytime with sufficient illumination, pedestrian detection at night is still a critical and challenging problem for video surveillance systems. To respond to this need, in this paper, we provide an affordable solution with a near-infrared stereo network camera, as well as a novel three-dimensional foreground pedestrian detection model...
October 16, 2017: Sensors
https://www.readbyqxmd.com/read/29023311/comparison-of-extended-depth-of-focus-prototype-contact-lenses-with-the-1-day-acuvue-moist-multifocal-after-one-week-of-wear
#2
Jennifer Sha, Daniel Tilia, Danny Kho, Jennie Diec, Varghese Thomas, Ravi C Bakaraju
OBJECTIVES: To compare visual performance of extended depth-of-focus (EDOF) prototypes with a new, center-near, commercial, multifocal contact lens. METHODS: Presbyopic participants (n=57) wore 1-Day ACUVUE MOIST MULTIFOCAL (1DAMM) and an EDOF prototype for one week in a double-masked, prospective, cross-over, randomized clinical trial. Manufacturers' guide was used to select the first pair of lens to be fit based on subjective distance refraction and near addition...
October 11, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29022291/comparison-of-contact-lens-corrected-quality-of-vision-and-life-of-keratoconus-and-myopic-patients
#3
Sunghoon Lee, Gangwook Jung, Hyung Keun Lee
PURPOSE: To compare and analyze changes in vision quality, subjective symptoms, and psycho-social satisfaction in keratoconus and myopic patients following the wearing of contact lenses. METHODS: This study enrolled 25 keratoconus and 25 myopic patients with corrected vision over 0.8 according to the Snellen chart due to treatment with contact lenses. Patients were surveyed prior to the wearing of contact lenses, and again after three months of contact lens usage with a questionnaire about quality of vision and life...
August 26, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28960059/near-infrared-to-visible-organic-upconversion-devices-based-on-organic-light-emitting-field-effect-transistors
#4
Dongwei Li, Yongsheng Hu, Nan Zhang, Ying Lv, Jie Lin, Xiaoyang Guo, Yi Fan, Jinsong Luo, Xingyuan Liu
The near-infrared (NIR) to visible upconversion devices have attracted great attention because of their potential applications in the fields of night vision, medical imaging, and military security. Herein, a novel all-organic upconversion device architecture has been first proposed and developed by incorporating a NIR absorption layer between the carrier transport layer and the emission layer in heterostructured organic light-emitting field effect transistors (OLEFETs). The as-prepared devices show a typical photon-to-photon upconversion efficiency as high as 7% (maximum of 28...
October 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28956858/circadian-rhythms-of-retinomotor-movement-in-a-marine-megapredator-the-atlantic-tarpon-megalops-atlanticus
#5
Kristin L Kopperud, Michael S Grace
Many ecologically and economically important marine fish species worldwide spend portions of their lives in coastal regions that are increasingly inundated by artificial light at night. However, while extensive research illustrates the harmful effects of inappropriate light exposure on biological timing in humans, rodents and birds, comparable studies on marine fish are virtually nonexistent. This study aimed to assess the effects of light on biological clock function in the marine fish retina using the Atlantic tarpon (Megalops atlanticus) as a model...
September 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28948126/retinitis-pigmentosa-associated-with-glucose-6-phosphate-dehydrogenase-deficiency
#6
Bryan Thiel, Aman Sharma, Saad Shaikh
We report a case of new onset retinitis pigmentosa (RP) associated with a glucose-6-phosphate dehydrogenase (G6PD) deficiency in a 63-year-old African-American male who presented with worsening night vision over a period of five years. The pathogenesis of G6PD-mediated oxidative biological damage is reviewed and a mechanism for the onset of retinal disease proposed.
July 23, 2017: Curēus
https://www.readbyqxmd.com/read/28946643/improving-night-time-driving-safety-using-vision-based-classification-techniques
#7
Jong-Chih Chien, Yong-Sheng Chen, Jiann-Der Lee
The risks involved in nighttime driving include drowsy drivers and dangerous vehicles. Prominent among the more dangerous vehicles around at night are the larger vehicles which are usually moving faster at night on a highway. In addition, the risk level of driving around larger vehicles rises significantly when the driver's attention becomes distracted, even for a short period of time. For the purpose of alerting the driver and elevating his or her safety, in this paper we propose two components for any modern vision-based Advanced Drivers Assistance System (ADAS)...
September 24, 2017: Sensors
https://www.readbyqxmd.com/read/28942764/ocular-manifestations-of-obstructive-sleep-apnea
#8
Matthew Santos, R Jeffrey Hofmann
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) incurs a host of systemic side effects. The eyes are particularly susceptible to both mechanical and vascular sequelae of the disease. This paper outlines the ocular manifestations of sleep apnea. The authors hope to increase awareness of the ocular complications of this common disorder and increase communication and co-management between eye-care providers and sleep specialists alike. METHODS: Data were collected from PubMed and the Brown University Library Collection...
September 20, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28912962/gene-panel-sequencing-in-brazilian-patients-with-retinitis-pigmentosa
#9
Kárita Antunes Costa, Mariana Vallim Salles, Chris Whitebirch, John Chiang, Juliana Maria Ferraz Sallum
BACKGROUND: Retinal dystrophies constitute a group of diseases characterized by clinical variability and pronounced genetic heterogeneity. Retinitis pigmentosa is the most common subtype of hereditary retinal dystrophy and is characterized by a progressive loss of peripheral field vision (Tunnel Vision), eventual loss of central vision, and progressive night blindness. The characteristics of the fundus changes include bone-spicule formations, attenuated blood vessels, reduced and/or abnormal electroretinograms, changes in structure imaged by optical coherence tomography, and subjective changes in visual function...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28856684/selective-synaptic-connections-in-the-retinal-pathway-for-night-vision
#10
Deborah L Beaudoin, Mania Kupershtok, Jonathan B Demb
The mammalian retina encodes visual information in dim light using rod photoreceptors and a specialized circuit: rods→rod bipolar cells→AII amacrine cell. The AII amacrine cell uses sign-conserving electrical synapses to modulate ON cone bipolar cell terminals and sign-inverting chemical (glycinergic) synapses to modulate OFF cone cell bipolar terminals; these ON and OFF cone bipolar terminals then drive the output neurons, retinal ganglion cells (RGCs), following light increments and decrements, respectively...
August 30, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28845548/antiwrinkle-effect-of-topical-adhesive-pads-on-crow-s-feet-how-long-does-the-effect-last-for
#11
Vittorio Mazzarello, Marco Ferrari, Antonio Bulla, Gabriella Piu, Andrea Montella
BACKGROUND: Adhesive pads should reduce the action of the local muscle contraction on the skin leading to a decrease in the depth of existing wrinkles and the formation of new dynamic wrinkles. AIM OF THE WORK: This study aims at assessing the antiwrinkles action of adhesive pads during time, and the temporary improvement of facial skin appearance by reducing the vision of linear wrinkles and improving skin elasticity. PATIENTS AND METHODS: Thirty-nine subjects participated to a placebo-controlled study...
August 28, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28820625/multimodal-image-analysis-of-the-retina-in-hunter-syndrome-mucopolysaccharidosis-type-ii-case-report
#12
Isadora Darriba Macedo Salvucci, Simone Finzi, Maria Kiyoko Oyamada, Chong Ae Kim, Sérgio Luis Gianotti Pimentel
INTRODUCTION: We report a case of retinal and posterior ocular findings in a 33-year-old man diagnosed with Hunter syndrome (Mucopolysaccharidosis type II) in a multimodal imaging way. CASE PRESENTATION: Our patient was complaining of blurred night vision for the past 3 years. He had not received any systemic treatment for Hunter syndrome. Vision acuity was 20/20 in both eyes and corneas were clear. Fundus examination revealed bilateral crowded and hyperemic optic nerve heads (elevated in the ocular ultrasound) and areas of subretinal hypopigmentation...
August 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28810964/a-study-on-the-tactical-safety-of-endotracheal-intubation-under-darkness
#13
Sedat Bilge, Attila Aydin, Meltem Bilge, Cemile Aydin, Erdem Cevik, Mehmet Eryilmaz
OBJECTIVE: Strict blackout discipline is extremely important for all military units. To be able to effectively determine wound characteristics and perform the necessary interventions at nighttime, vision and light restrictions can be mitigated through the use of tactical night vision goggles (NVGs). The lamp of the classical laryngoscope (CL) can be seen with the naked eye; infrared light, on the other hand, cannot be perceived without the use of NVGs. The aim of the study is to evaluate the safety of endotracheal intubation (ETI) procedures in the dark under tactically safe conditions with modified laryngoscope (ML) model...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810713/co-opted-megasatellite-dna-drives-evolution-of-secondary-night-vision-in-azara-s-owl-monkey
#14
Akihiko Koga, Hideyuki Tanabe, Yuriko Hirai, Hiroo Imai, Masanori Imamura, Takao Oishi, Roscoe Stanyon, Hirohisa Hirai
Owl monkeys (genus Aotus) are the only taxon in simian primates that consists of nocturnal or otherwise cathemeral species. Their night vision is superior to that of other monkeys, apes, and humans but not as good as that of typical nocturnal mammals. This incomplete night vision has been used to conclude that these monkeys only secondarily adapted to a nocturnal lifestyle, or to their cathemeral lifestyle that involves high night-time activity. It is known that the rod cells of many nocturnal mammals possess a unique nuclear architecture in which heterochromatin is centrally located...
July 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28794459/multiple-excitatory-actions-of-orexins-upon-thalamo-cortical-neurons-in-dorsal-lateral-geniculate-nucleus-implications-for-vision-modulation-by-arousal
#15
Lukasz Chrobok, Katarzyna Palus-Chramiec, Anna Chrzanowska, Mariusz Kepczynski, Marian Henryk Lewandowski
The orexinergic system of the lateral hypothalamus plays a crucial role in maintaining wakefulness and mediating arousal in a circadian time-dependent manner. Due to the extensive connections of orexinergic neurons, both orexins (OXA and OXB) exert mainly excitatory effects upon remote brain areas, including the thalamus. The dorsal lateral geniculate nucleus (DLG) is a relay thalamic centre for the visual system. Its thalamo-cortical (TC) neurons convey photic information from the retina to the primary visual cortex...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28744096/subjective-evaluation-of-uncorrected-vision-in-patients-undergoing-cataract-surgery-with-diffractive-multifocal-lenses-and-monovision
#16
Ricardo Alexandre Stock, Thaís Thumé, Luan Gabriel Paese, Elcio Luiz Bonamigo
PURPOSE: To analyze patient satisfaction and difficulties with bilateral multifocal intraocular lenses (IOLs) implantation and aspheric monofocal IOLs implantation using monovision, after cataract surgery. MATERIALS AND METHODS: A total of 61 participants were included in the study, 29 with monovision and 32 with multifocal lenses. The inclusion criteria were patients undergoing phacoemulsification for bilateral visual impairment due to cataracts and presenting with postoperative visual acuity of 20/30 or better for distance and line J3 or better for near vision...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28731071/-potential-impact-of-colors-of-filters-used-in-sunglasses-on-the-melatonin-suppression-process
#17
Grzegorz Owczarek, Grzegorz Gralewicz, Agnieszka Wolska, Natalia Skuza, Piotr Jurowski
BACKGROUND: In this article the methods for determining spectral transmittance of optical radiation in the visible waveband range through selected materials used as optical filters against solar glare were described. MATERIAL AND METHODS: Transmittance coefficients specified for the fraction of light passing through tested filters, taking into account the mechanism of eye adaptation to daylight and night vision and the melatonin suppression process were compared for 4 dyed sunglass filters...
July 26, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28720880/pattern-of-retinal-morphological-and-functional-decay-in-a-light-inducible-rhodopsin-mutant-mouse
#18
Claudia Gargini, Elena Novelli, Ilaria Piano, Martina Biagioni, Enrica Strettoi
Hallmarks of Retinitis Pigmentosa (RP), a family of genetic diseases, are a typical rod-cone-degeneration with initial night blindness and loss of peripheral vision, followed by decreased daylight sight and progressive visual acuity loss up to legal blindness. Great heterogeneity in nature and function of mutated genes, variety of mutations for each of them, variability in phenotypic appearance and transmission modality contribute to make RP a still incurable disease. Translational research relies on appropriate animal models mimicking the genetic and phenotypic diversity of the human pathology...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28715957/the-transduction-cascade-in-retinal-on-bipolar-cells-signal-processing-and-disease
#19
Kirill A Martemyanov, Alapakkam P Sampath
Our robust visual experience is based on the reliable transfer of information from our photoreceptor cells, the rods and cones, to higher brain centers. At the very first synapse of the visual system, information is split into two separate pathways, ON and OFF, which encode increments and decrements in light intensity, respectively. The importance of this segregation is borne out in the fact that receptive fields in higher visual centers maintain a separation between ON and OFF regions. In the past decade, the molecular mechanisms underlying the generation of ON signals have been identified, which are unique in their use of a G-protein signaling cascade...
September 15, 2017: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28706175/-characteristics-and-risk-factors-for-falls-in-tertiary-hospital-inpatients
#20
Eun Ju Choi, Young Shin Lee, Eun Jung Yang, Ji Hui Kim, Yeon Hee Kim, Hyeoun Ae Park
PURPOSE: The aim of this study was to explore characteristics of and risk factors for accidental inpatient falls. METHODS: Participants were classified as fallers or non-fallers based on the fall history of inpatients in a tertiary hospital in Seoul between June 2014 and May 2015. Data on falls were obtained from the fall report forms and data on risk factors were obtained from the electronic nursing records. Characteristics of fallers and non-fallers were analyzed using descriptive statistics...
June 2017: Journal of Korean Academy of Nursing
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