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https://www.readbyqxmd.com/read/29161162/patient-perceived-and-laboratory-measured-halos-associated-with-diffractive-bifocal-and-trifocal-intraocular-lenses
#1
Francisco Alba-Bueno, Nuria Garzón, Fidel Vega, Francisco Poyales, María S Millán
PURPOSE: To examine and assess the halos generated in distance vision by multifocal intraocular lenses (IOLs) using both in vitro objective and in vivo subjective methods. SETTING: The objective method was carried out in the optics laboratory of the Applied Optics and Image Processing Group (Universitat Politècnica de Catalunya -Barcelona). The psychophysical and subjective methods were carried out in the Instituto de Oftalmología Avanzada Madrid Innova Ocular...
November 21, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29122907/clival-metastasis-from-a-gastrointestinal-adenocarcinoma-causing-multiple-cranial-neuropathies
#2
Charlotte Lee, Jesse M Thon, Amar Dhand
A 78-year-old man with a history of benign prostatic hyperplasia presented with double vision, facial pain, altered taste and headache for 7 weeks. Neurological exam was notable for palsies of the right V, VI, VII and XII cranial nerves. An expansive clival mass and multiple lesions in the vertebra were found on MRI. Radionuclide studies showed extensive tumour burden in his liver and peritoneum. His serologies showed normal carcinoembryonic antigen and carbohydrate antigen 19-9 levels and modestly elevated prostate-specific antigen, which was a red herring...
November 8, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29116367/double-blind-comparison-of-the-two-hallucinogens-psilocybin-and-dextromethorphan-similarities-and-differences-in-subjective-experiences
#3
Theresa M Carbonaro, Matthew W Johnson, Ethan Hurwitz, Roland R Griffiths
RATIONALE: Although psilocybin and dextromethorphan (DXM) are hallucinogens, they have different receptor mechanisms of action and have not been directly compared. OBJECTIVE: This study compared subjective, behavioral, and physiological effects of psilocybin and dextromethorphan under conditions that minimized expectancy effects. METHODS: Single, acute oral doses of psilocybin (10, 20, 30 mg/70 kg), DXM (400 mg/70 kg), and placebo were administered under double-blind conditions to 20 healthy participants with histories of hallucinogen use...
November 7, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29114308/calvarial-orbital-metastasis-of-prostate-carcinoma-which-was-diagnosed-with-sixth-cranial-nerve-palsy
#4
Zühtü Özbek, Emre Özkara, Deniz Arik, Metin Atasoy Ant
Sixth nerve palsy is frequently due to infectious orbital lesions, trauma, elevated intracranial pressure, brainstem lesions, and vasculopathies. Here, we describe a rare cause of sixth cranial nerve (CN) palsy secondary to calvarial and orbital metastasis of prostate carcinoma. The diagnosis of the prostate carcinoma with sixth CN palsy is a very rare condition. A 66-year-old male patient presented with complaints of blurred vision, double vision, and inability to move outward in the right eye for 3 weeks...
October 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29098193/double-intracavernous-breakage-of-sachse-s-knife-blade-management-of-a-rare-complication-performing-direct-vision-internal-urethrotomy
#5
Alfonso Benincasa, Alberto Saita, Angelo Pinto, Carmine Pilerci, Lamberti Francesco, Aniello Russo, Giuseppe Benincasa
Background: Although the breakage of a Sachse's knife blade is already a rare event while performing optical internal urethrotomy, a double failure appears to be at the same time a unique and a challenging complication to manage since no reference has emerged from literature review. Case Presentation: A male patient, 80 years of age, underwent retreatment of recurrent urethral stricture that occurred after transurethral resection of the prostate. The latter was complicated by severe intraoperative urethrorrhagia; this is the reason he was transferred from another institution where at first a suprapubic cystostomy was carried out, followed by urethral recanalization through internal urethrotomy and finally he underwent intracavernous Sachse's knife blade discharge...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29091623/design-of-direct-vision-cyclo-olefin-polymer-double-amici-prism-for-spectral-imaging
#6
Lei Wang, Zhengzheng Shao, Wusheng Tang, Jiying Liu, Qianwen Nie, Hui Jia, Suian Dai, Jubo Zhu, Xiujian Li
A direct-vision Amici prism is a desired dispersion element in the value of spectrometers and spectral imaging systems. In this paper, we focus on designing a direct-vision cyclo-olefin-polymer double Amici prism for spectral imaging systems. We illustrate a designed structure: E48R/N-SF4/E48R, from which we obtain 13 deg dispersion across the visible spectrum, which is equivalent to 700 line pairs/mm grating. We construct a simulative spectral imaging system with the designed direct-vision cyclo-olefin-polymer double Amici prism in optical design software and compare its imaging performance to a glass double Amici prism in the same system...
October 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29082670/two-visual-systems-in-one-eyestalk-the-unusual-optic-lobe-metamorphosis-in-the-stomatopod-alima-pacifica
#7
Chan Lin, Thomas W Cronin
The compound eyes of adult stomatopod crustaceans have two to six ommatidial rows at the equator, called the midband, that are often specialized for color and polarization vision. Beneath the retina, this midband specialization is represented as enlarged optic lobe lamina cartridges and a hernia-like expansion in the medulla. We studied how the optic lobe transforms from the larvae, which possess typical crustacean larval compound eyes without a specialized midband, through metamorphosis into the adults with the midband in a two midband-row species Alima pacifica...
October 30, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/29074305/scleral-lens-after-intracorneal-ring-segments-in-patients-with-keratoconus
#8
Varsha M Rathi, Preeji S Mandathara, Srikanth Dumpati, Virender S Sangwan
BACKGROUND: To report the use of scleral lens (ScCL) to improve vision in patients having keratoconus who had intracorneal ring segment (ICRS) surgery. METHODS: Two eyes of two keratoconus patients fitted with ScCL (PROSE - prosthetic replacement of the ocular surface ecosystem, USA) after having undergone ICRS surgery are reported as noncomparative interventional case series. The ICRS implanted were INTACs and kerarings. Indications, visual acuity with ScCL, complications and follow-up are reported...
October 24, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29070994/nivolumab-induced-myocarditis-concomitant-with-myasthenia-gravis
#9
Yoko Fukasawa, Kazuya Sasaki, Maika Natsume, Makoto Nakashima, Shuji Ota, Kiyotaka Watanabe, Yoshihisa Takahashi, Fukuo Kondo, Ken Kozuma, Nobuhiko Seki
We report a 69-year-old female patient with advanced lung cancer who developed myocarditis concomitant with myasthenia gravis (MG), also known as "Herzmyasthenie," after 3 cycles of nivolumab administration. Her initial symptoms were general malaise and double vision. However, her myocarditis deteriorated rapidly the following day, necessitating a temporary pacemaker and noninvasive positive pressure ventilation in the intensive care unit. Immunohistochemical examination of a myocardial biopsy suggested an immune response on the basis of HLA associations...
September 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/29058517/abducens-nerve-palsy-after-orbital-decompression
#10
Shani Golan, Robert A Goldberg
INTRODUCTION: Double vision after decompression surgery for Thyroid Eye Disease (TED) is well described in the literature and the incidence ranges from 0 to 64%. The Mechanisms for new onset diplopia after orbital decompression are poorly understood. Common theories include: Fibrosis of muscles, displacement of the muscle cone, and reactivation of the TED. AIM: We present two cases with Abducens nerve palsy after uncomplicated secondary orbital decompression surgery...
October 23, 2017: Orbit
https://www.readbyqxmd.com/read/29056498/a-comparison-of-3-videolaryngoscopes-for-double-lumen-tube-intubation-in-humans-by-users-with-mixed-experience-a-randomized-controlled-study
#11
Mohamed R El-Tahan, Alaa M Khidr, Ihab S Gaarour, Saeed A Alshadwi, Talal M Alghamdi, Abdulmohsen Al'ghamdi
OBJECTIVES: To test the hypothesis that laryngoscopy using the Airtraq (Prodol Limited, Viscaya, Spain) or King Vision laryngoscope (KVL) (Ambu A/S, Ballerup, Denmark) would result in a shorter time for successful double-lumen endobronchial tube (DLT) intubation by users with mixed experience than the time required using the Macintosh or GlideScope (Verathon Inc., Bothell, WA) laryngoscopes. DESIGN: A randomized, prospective, blind study. SETTING: A single university hospital...
August 4, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29055973/characterisation-of-corn-extrudates-with-the-addition-of-brewers-spent-grain-as-a-raw-material-for-the-production-of-functional-batters
#12
Tomasz Żelaziński, Adam Ekielski, Adam Siwek, Leszek Dardziński
BACKGROUND: Novel food batters, recommended for various products, are at present manufactured by extru- sion. Thanks to this, it is possible to look for and process new raw materials, if their processing has so far been considered impossible or economically unviable. The purpose of the work was therefore to investigate the extrudates produced from the corn and brewers' spent grain compounds that are subsequently used as raw material for food batter production. METHODS: The work presents the findings of research on extrusion of corn mixes with varying levels of brewers' spent grains, to the maximum amount of 30%...
July 2017: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/29051539/ophthalmological-symptoms-in-children-with-intracranial-cysts
#13
Anna Gotz Wieckowska, Lidia Glowka, Agata Brazert, Marta Pawlak
The purpose of this study was to perform an ophthalmological assessment in children with intracranial cysts and to assess the correlation between the occurrence of cysts and visual disorders. The documentation of 46 children with intracranial cysts, monitored by the Children's Outpatient Ophthalmology Clinic, Poznan, Poland was analysed. The best corrected visual acuity (BCVA), the alignment of the eyes, visual evoked potentials (VEP), comprehensive eye examination were performed in all patients. Additional ophthalmological tests were conducted to eliminate other causes of decreased visual acuity...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29036138/double-distortion-correction-method-in-a-catadioptric-vision-system-with-a-conic-mirror
#14
Fuqiang Zhou, Xin Chen, Haishu Tan
Because of the low calibration precision caused by reflector distortion in catadioptric vision systems with conic mirrors, we proposed a double distortion correction model based on the panoramic image rectification. The lens distortion and the reflector distortion are analyzed independently in the mathematic model of the double distortion correction. Moreover, the modified model in this paper added the trigonometric functions into the polynomial model to solve the combined distortion. Additionally, extensive experiments, both simulative and real data, have been carried out and show that the proposed model achieves comparable measurement accuracy in contrast with the traditional distortion method...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29036051/combined-measurement-system-for-double-shield-tunnel-boring-machine-guidance-based-on-optical-and-visual-methods
#15
Jiarui Lin, Kai Gao, Yang Gao, Zheng Wang
In order to detect the position of the cutting shield at the head of a double shield tunnel boring machine (TBM) during the excavation, this paper develops a combined measurement system which is mainly composed of several optical feature points, a monocular vision sensor, a laser target sensor, and a total station. The different elements of the combined system are mounted on the TBM in suitable sequence, and the position of the cutting shield in the reference total station frame is determined by coordinate transformations...
October 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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
#16
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/29022183/in-search-of-a-comprehensible-set-of-endpoints-for-the-routine-monitoring-of-neurotoxicity-in-vertebrates-sensory-perception-and-nerve-transmission-in-zebrafish-danio-rerio-embryos
#17
Daniel Stengel, Sarah Wahby, Thomas Braunbeck
In order to develop a test battery based on a variety of neurological systems in fish, three sensory systems (vision, olfaction, and lateral line) as well as nerve transmission (acetylcholine esterase) were analyzed in zebrafish (Danio rerio) embryos with respect to their suitability as a model for the screening of neurotoxic trace substances in aquatic ecosystems. As a selection of known or putative neurotoxic compounds, amidotrizoic acid, caffeine, cypermethrin, dichlorvos, 2,4-dinitrotoluene, 2,4-dichlorophenol, 4-nonylphenol, perfluorooctanoic acid, and perfluorooctane sulfonic acid were tested in the fish embryo test (OECD test guideline 236) to determine EC10 values, which were then used as maximum test concentration in subsequent neurotoxicity tests...
October 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29018076/protocol-for-a-prospective-interventional-trial-to-develop-a-diagnostic-index-test-for-stroke-as-a-cause-of-vertigo-dizziness-and-imbalance-in-the-emergency-room-emvert-study
#18
Ken Möhwald, Stanislavs Bardins, Hans-Helge Müller, Klaus Jahn, Andreas Zwergal
INTRODUCTION: Identifying stroke as a cause of acute vertigo, dizziness and imbalance in the emergency room is still a clinical challenge. Many patients are admitted to stroke units, but only a minority will have strokes. This imposes a heavy financial burden on the healthcare system. The aim of this study is to develop a diagnostic index test to identify patients with a high risk of having a stroke as the cause of acute vertigo and imbalance. METHODS AND ANALYSIS: Patients with acute onset of vertigo, dizziness, postural imbalance or double vision within the last 24 hours lasting for at least 10 min are eligible to be included in the study...
October 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/29017984/superficial-siderosis-associated-with-a-pineal-cavernous-malformation
#19
Takafumi Ogura, Atsushi Kambe, Makoto Sakamoto, Yuki Shinohara, Toshihide Ogawa, Masamichi Kurosaki
BACKGROUND: Cavernous malformations in the pineal region are very rare and are difficult to anticipate from preoperative evaluation in patients with pineal apoplexy. We herein report the first case of a pineal cavernous malformation with superficial siderosis. Radiological findings were helpful in identifying the presence of the cavernous malformation. CASE DESCRIPTION: A 47-year-old female presented with a 4-month history of progressive headache, nausea, and dizziness...
October 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28994413/flexed8-the-first-member-of-a-fast-and-flexible-sample-changer-family-for-macromolecular-crystallography
#20
Gergely Papp, Franck Felisaz, Clement Sorez, Marcos Lopez-Marrero, Robert Janocha, Babu Manjasetty, Alexandre Gobbo, Hassan Belrhali, Matthew W Bowler, Florent Cipriani
Automated sample changers are now standard equipment for modern macromolecular crystallography synchrotron beamlines. Nevertheless, most are only compatible with a single type of sample holder and puck. Recent work aimed at reducing sample-handling efforts and crystal-alignment times at beamlines has resulted in a new generation of compact and precise sample holders for cryocrystallography: miniSPINE and NewPin [see the companion paper by Papp et al. (2017, Acta Cryst., D73, 829-840)]. With full data collection now possible within seconds at most advanced beamlines, and future fourth-generation synchrotron sources promising to extract data in a few tens of milliseconds, the time taken to mount and centre a sample is rate-limiting...
October 1, 2017: Acta Crystallographica. Section D, Structural Biology
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