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https://www.readbyqxmd.com/read/29340968/a-novel-blink-detection-method-based-on-pupillometry-noise
#1
Ronen Hershman, Avishai Henik, Noga Cohen
Pupillometry (or the measurement of pupil size) is commonly used as an index of cognitive load and arousal. Pupil size data are recorded using eyetracking devices that provide an output containing pupil size at various points in time. During blinks the eyetracking device loses track of the pupil, resulting in missing values in the output file. The missing-sample time window is preceded and followed by a sharp change in the recorded pupil size, due to the opening and closing of the eyelids. This eyelid signal can create artificial effects if it is not removed from the data...
January 16, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/29339957/a-case-of-synchronised-pupillary-and-nasal-cycling-evidence-for-a-central-autonomic-pendulum
#2
Fion D Bremner, Jonas Gälldin Nordström
We previously reported that some healthy individuals show alternating anisocoria. We now describe one such individual who also exhibits a classic nasal cycle (alternating periods of nasal congestion and decongestion). We made measurements of his pupil asymmetry and nasal asymmetry at 21 different time points and found that these variables were always synchronised such that greater nasal airflow was invariably found on the same side as the larger pupil. We hypothesise that a common central oscillator may be responsible for co-modulating the sympathetic outflow to both nasal vessels and iris dilator muscles in some healthy individuals...
October 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29336629/pupillary-manifestations-of-marfan-syndrome-from-the-marfan-eye-consortium-of-chicago
#3
Sanket S Shah, Sudhi P Kurup, Hantamalala Ralay Ranaivo, Rebecca B Mets-Halgrimson, Marilyn B Mets
BACKGROUND: Marfan syndrome (MFS) is a genetic disorder that affects multiple organ systems, including the eye. The most common ocular manifestations include ectopia lentis and retinal detachment. The current literature qualitatively cites that MFS patients have miotic or "poorly dilating" pupils. This study was the first to quantitatively assess pupillary function in MFS patients. MATERIALS AND METHODS: 57 eyes from 29 MFS patients, 36 eyes from 18 pediatric age- and gender-matched controls, and 44 eyes from 22 adult age-matched controls were measured in a clinic-based cross sectional study...
January 16, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29336011/decreased-retinal-sensitivity-in-depressive-disorder-a-controlled-study
#4
G Berman, D Muttuvelu, D Berman, J I Larsen, R W Licht, J Ledolter, R H Kardon
OBJECTIVE: To compare pupil responses in depressed patients with a seasonal pattern, depressed patients without a seasonal pattern and healthy controls as a function of daylight hours on the testing day. METHOD: Patients suffering from a major depressive episode were included in wintertime. The pupil light reflex was measured at inclusion and in the following summer using a binocular pupillometer. A protocol of low (1 lux) and high (400 lux) intensity red and blue lights was used to assess rod, cone and melanopsin-containing intrinsic photosensitive retinal ganglion cell input to the pupil reflex...
January 15, 2018: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/29335387/clear-cell-carcinoma-of-the-abdominal-wall
#5
Ewa Kostrzeba, M Barczyk, M Wichtowski, R Garstecki, D Murawa
BACKGROUND: Clear cell carcinoma in scars after cesarean section is extremely rare, with only 22 cases reported in the literature. Management of this condition needs to be further explored. Here, we report of a patient with clear cell carcinoma of the abdominal wall that developed 35 years after cesarean section. CASE REPORT: The material of the study was a group of 61 patients divided into two groups. Group I - 35 deaf or with profound sensorineural hearing loss children (the pupils of the deaf and hard of hearing school), aged 5-17 years (average 9,2 years), 14 males, 21 females, II - control group comprised 26 normal hearing patients, aged 5-16 years (average 10,4 years), 14 males, 12 females (patients of Department of Pediatric Otolaryngology, Audiology and Phoniatrics, Medical University of Lodz)...
December 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/29335094/clinical-outcomes-of-laser-in%C3%A2-situ-keratomileusis-with-an-aberration-neutral-profile-centered-on-the-corneal-vertex-comparing-vector-planning-with-manifest-refraction-planning-for-the-treatment-of-myopic-astigmatism
#6
Maria Clara Arbelaez, Noel Alpins, Shwetabh Verma, George Stamatelatos, Juan Guillermo Arbelaez, Samuel Arba-Mosquera
PURPOSE: To evaluate clinical outcomes of laser in situ keratomileusis (LASIK) with an aberration-neutral profile centered on the estimated visual axis (considering 70% of the pupil offset toward the corneal vertex) comparing vector planning with manifest refraction planning for the treatment of myopic astigmatism. SETTING: Muscat Eye Laser Center, Muscat, Sultanate of Oman, Muscat, Oman. DESIGN: Retrospective case series. METHODS: The outcomes were evaluated at a 6-month follow-up in eyes showing ocular residual astigmatism (ORA) over 0...
December 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29331195/-educational-project-for-raising-awareness-of-food-hygiene-in-infant-schools
#7
REVIEW
Dimitri Kempf, Caroline Malinic, Mathilde Menoud, Aurore Rousseau, Camille Savoy
Five students from a nursing training institute designed an educational initiative aimed at infant school pupils. The objective of this primary prevention intervention was to raise children's awareness of food hygiene.
January 2018: Revue de L'infirmière
https://www.readbyqxmd.com/read/29330763/safe-and-sensible-preprocessing-and-baseline-correction-of-pupil-size-data
#8
Sebastiaan Mathôt, Jasper Fabius, Elle Van Heusden, Stefan Van der Stigchel
Measurement of pupil size (pupillometry) has recently gained renewed interest from psychologists, but there is little agreement on how pupil-size data is best analyzed. Here we focus on one aspect of pupillometric analyses: baseline correction, i.e., analyzing changes in pupil size relative to a baseline period. Baseline correction is useful in experiments that investigate the effect of some experimental manipulation on pupil size. In such experiments, baseline correction improves statistical power by taking into account random fluctuations in pupil size over time...
January 12, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/29329947/-pseudoexfoliation-syndrome-and-pseudoexfoliation-glaucoma
#9
REVIEW
C Schweitzer
Pseudoexfoliation syndrome is an age-related systemic disease that mainly affects the anterior structures of the eye. Despite a worldwide distribution, reported incidence and prevalence of this syndrome vary widely between ethnicities and geographical areas. The exfoliative material is composed mainly of abnormal cross-linked fibrils that accumulate progressively in some organs such as the heart, blood vessels, lungs or meninges, and particularly in the anterior structures of the eye. The exact pathophysiological process still remains unclear but the association of genetic and environmental factors are thought to play a role in the development and progressive extracellular accumulation of exfoliative material...
January 9, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29329533/nutritional-status-of-in-school-children-and-its-associated-factors-in-denkyembour-district-eastern-region-ghana-comparing-schools-with-feeding-and-non-school-feeding-policies
#10
Mavis Pearl Kwabla, Charlotte Gyan, Francis Zotor
BACKGROUND: Childhood malnutrition still remains a major public health problem impacting negatively on the academic aptitude of school-aged children (SAC) particularly in limited resource countries. The Government of Ghana in collaboration with the Dutch Government introduced the school feeding programme (SFP) to boost the nutritional status of SAC in the country. This study sought to compare the nutritional status of SAC enrolled in schools with the SFP and SAC enrolled in schools without the SFP in place for the purpose of identifying which group has the higher rate of malnutrition...
January 12, 2018: Nutrition Journal
https://www.readbyqxmd.com/read/29328180/modulation-transfer-function-of-a-fish-eye-lens-based-on-the-sixth-order-wave-aberration-theory
#11
Han Jia, Lijun Lu, Yiqing Cao
A calculation program of the modulation transfer function (MTF) of a fish-eye lens is developed with the autocorrelation method, in which the sixth-order wave aberration theory of ultra-wide-angle optical systems is used to simulate the wave aberration distribution at the exit pupil of the optical systems. The autocorrelation integral is processed with the Gauss-Legendre integral, and the magnification chromatic aberration is discussed to calculate polychromatic MTF. The MTF calculation results of a given example are then compared with those previously obtained based on the fourth-order wave aberration theory of plane-symmetrical optical systems and with those from the Zemax program...
January 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29319131/temozolomide-therapy-for-aggressive-pituitary-crooke-s-cells-corticotropinoma-causing-cushing-s-disease-a-case-report-with-literature-review
#12
Aleksandra Gilis-Januszewska, Małgorzata Wilusz, Jacek Pantofliński, Renata Turek-Jabrocka, Grzegorz Sokołowski, Anna Sowa-Staszczak, Łukasz Kluczyński, Dorota Pach, Grzegorz Zieliński, Alicja Hubalewska-Dydejczyk
AbstractContext: Aggressive pituitary tumours causing Cushing's Disease are very rare, difficult to treat, and usually resistant to conventional therapy. There is growing evidence for the use of temozolomide (TZM), an alkylating chemotherapeutic agent, as first line chemotherapy in tumours resistant to repeated neurosurgery, radiotherapy and adrenalectomy. OBJECTIVE: To present the response to TMZ in a rare case of an aggressive pituitary tumour in the course of Cushing's Disease and to review the literature referring to similar cases...
January 10, 2018: Endokrynologia Polska
https://www.readbyqxmd.com/read/29315718/experimental-investigation-of-accommodation-in-eyes-fit-with-multifocal-contact-lenses-using-a-clinical-auto-refractor
#13
Basal H Altoaimi, Pete Kollbaum, Dawn Meyer, Arthur Bradley
PURPOSE: Multifocal or multi-zone contact lenses are increasingly being fit to young eyes in an attempt to control myopia progression. However, success in achieving this aim may depend on how much the eye accommodates. The purpose of the current work was to evaluate the ability of an open-field clinical autorefractor to measure on-axis refractive state and accommodation in eyes fit with multifocal contact lenses (CLs). METHODS: Refractive state was measured with a Grand Seiko WAM-5500 autorefractor (www...
January 8, 2018: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/29315441/ray-tracing-analysis-of-the-corneal-power-from-scheimpflug-data
#14
Thomas Olsen, Peter Jeppesen
PURPOSE: To describe a method by which mapped corneal elevation data can be used for ray-tracing analysis of the effective corneal power. METHODS: Mapped elevation data of the front and back surface of the cornea exported by a clinical Scheimpflug camera was triangulated into a polygonal format and imported into a commercial optical engineering software. The focal length of the cornea was determined by exact ray tracing analysis of the distance giving the sharpest point spread function (PSF) at the selected image plane...
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29315412/automated-pupillometry-and-detection-of-clinical-transtentorial-brain-herniation-a-case-series
#15
Alexander Papangelou, Elizabeth K Zink, Wan-Tsu W Chang, Anthony Frattalone, Daniel Gergen, Allan Gottschalk, Romergryko G Geocadin
Introduction: Transtentorial herniation (TTH) is a life-threatening neurologic condition that typically results from expansion of supratentorial mass lesions. A change in bedside pupillary examination is central to the clinical diagnosis of TTH. Materials and Methods: To quantify the changes in the pupillary examination that precede and accompany TTH and its treatment, we evaluated 12 episodes of herniation in three patients with supratentorial mass lesions using automated pupillometry (NeurOptics, Inc...
January 5, 2018: Military Medicine
https://www.readbyqxmd.com/read/29314351/epidemiology-of-dermatophyte-infections-among-school-children-in-menoufia-governorate-egypt
#16
Azza G A Farag, Mostafa A Hammam, Reda A Ibrahim, Reda Z Mahfouz, Nada F Elnaidany, Masroor Qutubuddin, Rehab R E Tolba
BACKGROUND: Most superficial mycotic infections of human skin are due to dermatophytes. Children are frequently affected due to different predisposing factors, particularly overcrowding in classrooms. OBJECTIVES: To estimate the prevalence of dermatophytes infections and their related risk factors among school children in Menoufia Governorate, Egypt. SUBJECTS AND METHODS: Six public primary and preparatory schools were randomly selected and their pupils (n= 3464) were asked to complete a predesigned questionnaire covering both personal data and suspected risk factors for superficial dermatophyte infections...
January 4, 2018: Mycoses
https://www.readbyqxmd.com/read/29312818/pupillometry-reveals-the-physiological-underpinnings-of-the-aversion-to-holes
#17
Vladislav Ayzenberg, Meghan R Hickey, Stella F Lourenco
An unusual, but common, aversion to images with clusters of holes is known as trypophobia. Recent research suggests that trypophobic reactions are caused by visual spectral properties also present in aversive images of evolutionary threatening animals (e.g., snakes and spiders). However, despite similar spectral properties, it remains unknown whether there is a shared emotional response to holes and threatening animals. Whereas snakes and spiders are known to elicit a fear reaction, associated with the sympathetic nervous system, anecdotal reports from self-described trypophobes suggest reactions more consistent with disgust, which is associated with activation of the parasympathetic nervous system...
2018: PeerJ
https://www.readbyqxmd.com/read/29311335/melanopsin-and-l-cone-induced-pupil-constriction-is-inhibited-by-s-and-m-cones-in-humans
#18
Tom Woelders, Thomas Leenheers, Marijke C M Gordijn, Roelof A Hut, Domien G M Beersma, Emma J Wams
The human retina contains five photoreceptor types: rods; short (S)-, mid (M)-, and long (L)-wavelength-sensitive cones; and melanopsin-expressing ganglion cells. Recently, it has been shown that selective increments in M-cone activation are paradoxically perceived as brightness decrements, as opposed to L-cone increments. Here we show that similar effects are also observed in the pupillary light response, whereby M-cone or S-cone increments lead to pupil dilation whereas L-cone or melanopic illuminance increments resulted in pupil constriction...
January 8, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29305356/case-of-a-fixed-and-dilated-pupil-acute-anisocoria-secondary-to-aerosol-ipratropium-bromide
#19
Laura Royce, Chris Schulz, Nick Brown
No abstract text is available yet for this article.
January 4, 2018: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/29304855/prognostic-value-of-coagulation-tests-for-in-hospital-mortality-in-patients-with-traumatic-brain-injury
#20
Qiang Yuan, Jian Yu, Xing Wu, Yi-Rui Sun, Zhi-Qi Li, Zhuo-Ying Du, Xue-Hai Wu, Jin Hu
BACKGROUND: Coagulopathy is commonly observed after traumatic brain injury (TBI). However, it is not known whether using the standard independent predictors in conjunction with coagulation tests would improve their prognostic value. We determined the incidence of TBI-associated coagulopathy in patients with isolated TBI (iTBI), evaluated the prognostic value of coagulation tests for in-hospital mortality, and tested their predictive power for in-hospital mortality in patients with iTBI...
January 5, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
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