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https://www.readbyqxmd.com/read/29210828/predicting-short-term-subjective-vision-performance-of-contact-lenses-used-in-myopia-control
#1
Jennie Diec, Daniel Tilia, Varghese Thomas, Ravi C Bakaraju
OBJECTIVE: To investigate whether initial assessment of contact lenses prescribed for myopia control (MC) predicts short-term visual performance. METHOD: Retrospective analysis of 43 participants in a double-masked, randomized, cross-over trial wearing at least one lens: single-vision (SV) lens (1-DAY ACUVUE MOIST) or MC lenses (MiSight or Proclear Multifocal-Distance +2.00D). Participants completed questionnaires at the fitting visit, a take-home questionnaire (THQ) 3 days after fitting and finally at the assessment visit (≥5 days after fitting)...
November 28, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29193673/ophthalmic-features-of-cone-rod-dystrophy-caused-by-pathogenic-variants-in-the-alms1-gene
#2
Fadi Nasser, Nicole Weisschuh, Pietro Maffei, Gabriella Milan, Corina Heller, Eberhart Zrenner, Susanne Kohl, Laura Kuehlewein
PURPOSE: We aim to describe ophthalmic characteristics and systemic findings in a cohort of seven patients with cone-rod retinal dystrophy (CORD) caused by pathogenic variants in the ALMS1 gene. METHODS: Seven patients with Alström syndrome (ALMS) were included in the study. A comprehensive ophthalmological examination was performed, including best-corrected visual acuity (BCVA), a semiautomated kinetic visual field exam, colour vision testing, full-field electroretinography testing according to International Society for Clinical Electrophysiology of Vision (ISCEV) standards, spectral domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) imaging, and slit lamp and dilated fundus examination...
November 30, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29192330/the-role-of-ocelli-in-cockroach-optomotor-performance
#3
Anna Honkanen, Paulus Saari, Jouni Takalo, Kyösti Heimonen, Matti Weckström
Insect ocelli are relatively simple eyes that have been assigned various functions not related to pictorial vision. In some species they function as sensors of ambient light intensity, from which information is relayed to various parts of the nervous system, e.g., for the control of circadian rhythms. In this work we have investigated the possibility that the ocellar light stimulation changes the properties of the optomotor performance of the cockroach Periplaneta americana. We used a virtual reality environment where a panoramic moving image is presented to the cockroach while its movements are recorded with a trackball...
November 30, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29188504/design-and-development-of-aav-based-gene-supplementation-therapies-for-achromatopsia-and-retinitis-pigmentosa
#4
Christian Schön, Elvir Becirovic, Martin Biel, Stylianos Michalakis
Achromatopsia (ACHM) and retinitis pigmentosa (RP) are inherited disorders caused by mutations in cone and rod photoreceptor-specific genes, respectively. ACHM strongly impairs daylight vision, whereas RP initially affects night vision and daylight vision at later stages. Currently, gene supplementation therapies utilizing recombinant adeno-associated virus (rAAV) vectors are being developed for various forms of ACHM and RP. In this chapter, we describe the procedure of designing and developing specific and efficient rAAV vectors for cone- and rod-specific gene supplementation...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29179637/cone-dystrophy-and-ectopic-synaptogenesis-in-a-cacna1f-loss-of-function-model-of-congenital-stationary-night-blindness-csnb2a
#5
D M Waldner, N C Giraldo Sierra, S Bonfield, L Nguyen, I S Dimopoulos, Y Sauvé, W K Stell, N T Bech-Hansen
Congenital stationary night blindness 2A (CSNB2A) is an X-linked retinal disorder, characterized by phenotypically variable signs and symptoms of impaired vision. CSNB2A is due to mutations in CACNA1F, which codes for the pore-forming α1F subunit of a L-type voltage-gated calcium channel, Cav1.4. Mouse models of CSNB2A, used for characterizing the effects of various Cacna1f mutations, have revealed greater severity of defects than in human CSNB2A. Specifically, Cacna1f-knockout mice show an apparent lack of visual function, gradual retinal degeneration, and disruption of photoreceptor synaptic terminals...
November 28, 2017: Channels
https://www.readbyqxmd.com/read/29179439/next-generation-sequencing-identified-novel-heterozygous-nonsense-mutation-in-cngb1-gene-associated-with-retinitis-pigmentosa-in-a-chinese-patient
#6
Santasree Banerjee, Junping Yao, Xinxin Zhang, Jianjun Niu, Zhongshan Chen
Retinitis pigmentosa (RP) is a severe hereditary eye disease characterized by progressive degeneration of photoreceptors and subsequent loss of vision. Retinitis pigmentosa (RP) is a clinically and genetically heterogeneous group of retinal diseases. Germline mutations of CNGB1 is associated with retinitis pigmentosa. We have identified and investigated a 34-year-old Chinese man with markedly have night vision blindness and loss of midperipheral visual field. The proband also lose his far peripheral visual field and also central vision...
October 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/29172937/panretinal-photocoagulation-a-review-of-complications
#7
Shivani V Reddy, Deeba Husain
Panretinal photocoagulation (PRP) is a mainstay of therapy for retinal ischemic disease. The procedure involves creating thermal burns in the peripheral retina leading to tissue coagulation, the overall consequence of which is improved retinal oxygenation. While highly effective, there have been concerns historically regarding the anatomic effects and visual complications following PRP, the most common of which include choroidal effusions, exudative retinal detachments, macular edema, visual field deficits, and night vision defects...
November 27, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29153322/bats-use-path-integration-rather-than-acoustic-flow-to-assess-flight-distance-along-flyways
#8
Gal Aharon, Meshi Sadot, Yossi Yovel
Navigation can be achieved using different strategies from simple beaconing to complex map-based movement [1-4]. Bats display remarkable navigation capabilities, ranging from nightly commutes of several kilometers and up to seasonal migrations over thousands of kilometers [5]. Many bats have been suggested to fly along fixed routes termed "flyways," when flying from their roost to their foraging sites [6]. Flyways commonly stretch along linear landscape elements such as tree lines, hedges, or rivers [7]. When flying along a flyway, bats must estimate the distance they have traveled in order to determine when to turn...
November 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29135076/a-heterozygous-mutation-in-rpgr-associated-with-x-linked-retinitis-pigmentosa-in-a-patient-with-turner-syndrome-mosaicism-45-x-46-xx
#9
Qi Zhou, Fengxia Yao, Feng Wang, Hui Li, Rui Chen, Ruifang Sui
Turner syndrome with retinitis pigmentosa (RP) is rare, with only three cases reported based on clinical examination alone. We summarized the 4-year follow-up and molecular findings in a 28-year-old patient with Turner syndrome and the typical features of short stature and neck webbing, who also had X-linked RP. Her main complaints were night blindness and progressive loss of vision since the age of 9 years. Ophthalmologic examination, optical coherent tomographic imaging, and visual electrophysiology tests showed classic manifestations of RP...
November 14, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29116965/mechanical-properties-of-contact-lens-materials
#10
Eon Kim, Mou Saha, Klaus Ehrmann
OBJECTIVES: To evaluate the mechanical properties of commonly available soft contact lens materials and compare results using custom-built MicroTensometer. METHODS: The Young modulus, parameters for stress relaxation, and toughness of 18 types of single vision soft contact lenses were measured using custom-built MicroTensometer. Five lenses of each type were soaked in standard phosphate buffered saline and measured at a temperature of 35°C. Each lens was flattened and sliced into a rectangular strip sample using two parallel blades...
November 7, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29115646/a-new-perspective-on-life-saving-procedures-in-a-battlefield-setting-emergency-cricothyroidotomy-needle-thoracostomy-and-chest-tube-thoracostomy-with-night-vision-goggles
#11
Sedat Bilge, Attila Aydın, Meltem Bilge, Cemile Aydın, Erdem Çevik, Mehmet Eryılmaz
BACKGROUND: In the patients with multiple and serious trauma, early applications of life-saving procedures are related to improved survival. We tried to experimentally determine the feasibility of life-saving interventions that are performed with the aid of night vision goggles (NVG) in nighttime combat scenario. METHODS: Chest tube thoracostomy (CTT), emergency cricothyroidotomy (EC), and needle thoracostomy (NT) interventions were performed by 10 combatant medical staff...
November 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29058799/a-supramolecular-nanocomposite-as-a-near-infrared-transmitting-optical-filter-for-security-and-forensic-applications
#12
Samrat Ghosh, Sandeep Cherumukkil, Cherumuttathu H Suresh, Ayyappanpillai Ajayaghosh
Visibly opaque but near-infrared (NIR)-transparent materials are an essential component for night-vision photography, security imaging, and forensic applications. Herein, the development of a novel supramolecular black dye from a diketopyrrolopyrrole (DPP)-based low-molecular-weight organogelator is described. In the solution state, the monomer of DPP-Amide exhibits a deep green color with a broad absorption in the visible region due to firm intramolecular charge transfer from the donor to the acceptor unit...
October 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29047897/calibration-of-night-vision-goggles-an-si-units-based-gain-measurement-technique
#13
Vyacheslav B Podobedov, George P Eppeldauer, Thomas C Larason
A gain measurement technique for the calibration of night vision goggles (NVG) is proposed and evaluated. This technique is based on the radiance measurements at the input and output of the NVG. In contrast to the old definition, which uses a non-International System of Units (SI) traceable luminance, the "equivalent luminance unit," the suggested technique utilizes the radiance quantities that are traceable to the SI units through National Institute of Standards and Technology (NIST) standards. Due to the implementation of the scaling coefficients originating from the NVG spectral responsivities, the same NVG gain is expected within both techniques...
July 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29035295/nighttime-foreground-pedestrian-detection-based-on-three-dimensional-voxel-surface-model
#14
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
#15
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
#16
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
#17
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 18, 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
#18
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
#19
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
#20
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
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