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Frank Joseph Goes
The author discusses several of Albrecht Dürer's selfportraits. In some portraits his eyes are straight and in some others a divergent squint is present. Did Dürer do this on purpose or whas the squint indeed intermittently present? Analysis of the portrait of his mother gave the explanation.
February 13, 2019: Strabismus
Jinsong Zhu, Wei Li, Da Lin, Ge Zhao
A novel method of near-field computer vision (NFCV) was developed to monitor the jet trajectory during the jetting process, which was used to precisely predict the falling point position of the jet trajectory. By means of a high-resolution webcam, the NFCV sensor device collected near-field images of the jet trajectory. Preprocessing of collected images was carried out, which included squint image correction, noise elimination, and jet trajectory extraction. The features of the jet trajectory in the processed image were extracted, including: start-point slope (SPS), end-point slope (EPS), and overall trajectory slope (OTS) based on the proposed mean position method...
February 8, 2019: Sensors
Kirthi Koka, Atanu Barh, Bipasha Mukherjee
A 24-year-old male presented with decreased vision associated with inward deviation of his left eye since childhood and gradually progressive prominence of left eye for 6 months. Left eye examination revealed visual acuity of 2/60, convergent squint with restricted abduction and medial dystopia. Computed tomography (CT) scan showed a well-circumscribed mass with fat fluid levels temporal to the optic nerve indistinguishable from the left lateral rectus. Intraoperatively, a well-encapsulated mass was identified within the lateral rectus muscle which was confirmed as dermoid cyst on histopathology...
January 28, 2019: Orbit
Sibylle Scholtz, Lee MacMorris, Frank Krogmann, Gerd U Auffarth
PURPOSE: To be cross-eyed is a wide-spread dysfunction of the eye and squinting is currently regarded as unattractive. However, in ancient times, societies saw squinting as a sign of piety or even beauty. Even Venus was depicted heterophoric quite often. The most famous artist who was cross-eyed was Giovanni Francesco Barbieri (*08.02.1591; †22.12.1666, both Italy). His nickname was "Il Guercino" which means "the squinter." This article reflects on vision and art from the perspective of a cross-eyed person...
January 9, 2019: Strabismus
Zhichao Zhou, Yinghe Li, Yan Wang, Linghao Li, Tao Zeng
Doppler parameter estimation and compensation (DPEC) is an important technique for airborne SAR imaging due to the unpredictable disturbance of real aircraft trajectory. Traditional DPEC methods can be only applied for broadside, small- or medium-squint geometries, as they at most consider the spatial variance of the second-order Doppler phase. To implement the DPEC in very-high-squint geometries, we propose an extended multiple aperture mapdrift (EMAM) method in this paper for better accuracy. This advantage is achieved by further estimating and compensating the spatial variation of the third-order Doppler phase, i...
January 8, 2019: Sensors
Mehdi Goudarzi, Kathryn Berg, Lindsey M Pieper, Alexander F Schier
Hundreds of long non-coding RNAs (lncRNAs) have been identified as potential regulators of gene expression, but their functions remain largely unknown. To study the role of lncRNAs during vertebrate development, we selected 25 zebrafish lncRNAs based on their conservation, expression profile or proximity to developmental regulators, and used CRISPR-Cas9 to generate 32 deletion alleles. We observed altered transcription of neighboring genes in some mutants, but none of the lncRNAs were required for embryogenesis, viability or fertility...
January 8, 2019: ELife
Yanal Omari, Ahmad A Karkash, Razan A Mansour, Nisreen Amayiri, Maisa Swaidan, Maysa Al-Hussaini
PURPOSE: Medulloepithelioma is a rare brain tumor that has been classified as embryonal tumor with multilayered rosettes (ETMR) if it harbors C19MC amplification. In rare instances, it shows evidence of heterologous differentiation. METHODS: We report a case of a 10-year-old female who presented with headache, squint, and minimal left sided weakness of 1 week duration. RESULTS: Microscopy revealed a small round blue cell tumor with focal glandular and tubular differentiation...
January 8, 2019: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Xianyang Hu, Changzheng Ma, Ruizhi Hu, Tat Soon Yeo
Unmanned aerial vehicle borne frequency modulated continuous wave synthetic aperture radars are attracting more and more attention due to their low cost and flexible operation capacity, including the ability to capture images at different elevation angles for precise target identification. However, small unmanned aerial vehicles suffer from large trajectory deviation and severe range-azimuth coupling due to their simple navigational control and susceptibility to air turbulence. In this paper, we utilize the squint minimization technique to reduce this coupling while simultaneously eliminating intra-pulse motion-induced effects with an additional spectrum scaling...
December 27, 2018: Sensors
Wen-Ting Luo, Tong Qiao, Hai-Yun Ye, Si-Hong Li, Quan-Li Chen
AIM: To describe the clinical features of congenital double elevator palsy (CDEP) and to evaluate various surgical outcomes between the standard Knapp and augmented Knapp procedures, based on improvements in primary eye position and ocular motility. METHODS: Twenty-two patients with CDEP at Shanghai Children's Hospital were enrolled from July 2014 to January 2018. The forced duction test (FDT) was negative in 21 patients, aged 8mo to 12y (mean 5.4y). Patients were divided into two treatment groups: 16 patients underwent the standard Knapp procedure (group A), with or without horizontal squint procedure; and 5 patients underwent the augmented Knapp procedure (Foster procedure; group B)...
2018: International Journal of Ophthalmology
Monika Wipf, Britt-Isabelle Berg, Anja Palmowski-Wolfe
Introduction: To assess long-term efficacy of bimedial rectus tendon elongation with Tutopatch in thyroid-associated orbitopathy (TAO). Materials and Methods: Retrospective chart review of 5 patients with TAO undergoing bimedial rectus recession with Tutopatch tendon elongation between 2009 and 2015. We analyzed horizontal squint angles, motility, field of binocular single vision, dose effect of surgery, and when possible oculodynamic MRI (OD-MRI). Dose effect and motility were compared to 4 TAO patients with conventional bimedial recession...
2018: Journal of Ophthalmology
Jitendra Jethani, Paaraj Dave
Purpose: To assess the variability of assessing the ocular torsion on fundus photographs among strabismus surgeons. Methods: This was a prospective, noninterventional, clinical trial involving 16 trained and experienced squint surgeons participated in the study. Two videos were prepared of a total of 10 fundus pictures with or without lines for disc foveal angle. The first video had a 4 s viewing time for each fundus image. The second video had the disc foveal lines drawn and a similar 4 s viewing time for each image...
September 2018: Indian Journal of Ophthalmology
Martina Giacalone, Greta Mastrangelo, Niccolò Parri
An 18-month-old girl presented to the emergency department with the chief complaint of squinting. The right eye demonstrated esotropia, heterochromia, and anisocoria. Ocular point-of-care ultrasound facilitated the rapid diagnosis of retinoblastoma, which was confirmed by computed tomography scan and orbital magnetic resonance imaging.
August 2018: Pediatric Emergency Care
Brandon J Rea, Anne-Sophie Wattiez, Jayme S Waite, William C Castonguay, Chantel M Schmidt, Aaron M Fairbanks, Bennett R Robertson, Cameron J Brown, Bianca N Mason, Maria-Cristina Moldovan-Loomis, Leon F Garcia-Martinez, Pieter Poolman, Johannes Ledolter, Randy H Kardon, Levi P Sowers, Andrew F Russo
Migraine is the third most common disease in the world (behind dental caries and tension-type headache) with an estimated global prevalence of 15%, yet its etiology remains poorly understood. Recent clinical trials have heralded the potential of therapeutic antibodies that block the actions of the neuropeptide calcitonin gene-related peptide (CGRP) or its receptor to prevent migraine. Calcitonin gene-related peptide is believed to contribute to trigeminal nerve hypersensitivity and photosensitivity in migraine, but a direct role in pain associated with migraine has not been established...
November 2018: Pain
Hooman Nezamfar, Seyed Sadegh Mohseni Salehi, Matt Higger, Deniz Erdogmus
Even with state-of-the-art techniques there are individuals whose paralysis prevents them from communicating with others. Brain⁻Computer-Interfaces (BCI) aim to utilize brain waves to construct a voice for those whose needs remain unmet. In this paper we compare the efficacy of a BCI input signal, code-VEP via Electroencephalography, against eye gaze tracking, among the most popular modalities used. These results, on healthy individuals without paralysis, suggest that while eye tracking works well for some, it does not work well or at all for others; the latter group includes individuals with corrected vision or those who squint their eyes unintentionally while focusing on a task...
July 7, 2018: Brain Sciences
Ji-Hyun Lee, Giwoong Hong
Clarification is needed regarding the definitions and classification of groove and hollowness of the infraorbital region depending on the cause, anatomical characteristics, and appearance. Grooves in the infraorbital region can be classified as nasojugal grooves (or folds), tear trough deformities, and palpebromalar grooves; these can be differentiated based on anatomical characteristics. They are caused by the herniation of intraorbital fat, atrophy of the skin and subcutaneous fat, contraction of the orbital part of the orbicularis oculi muscle or squinting, and malar bone resorption...
May 2018: Archives of Plastic Surgery
Niranjan Pehere, Pratik Chougule, Gordon N Dutton
Purpose: The aim of this study is to identify common causes, associated ophthalmological abnormalities, and systemic comorbidities in children in Andhra Pradesh, India, with cerebral visual impairment (CVI). Methods: A retrospective review of case records of all children aged <16 years with diagnosis of CVI seen between January 2016 and December 2016 was carried out. Data were collected for their age, gender, cause of CVI, refraction, accommodation, anterior and posterior segment examination findings, and systemic problems...
June 2018: Indian Journal of Ophthalmology
H M M Herath, J S Hewavithana, C M De Silva, O A R Kularathna, N P Weerasinghe
BACKGROUND: Dengue fever is a common mosquito-borne viral illness with a clinical spectrum ranging from a simple febrile illness to potentially life-threatening complications such as dengue hemorrhagic fever and dengue shock syndrome. Dengue infection can affect many organs, including the central nervous system. The neurological manifestations reported in dengue infections are meningitis, encephalitis, stroke, acute disseminated encephalomyelitis, and Guillain-Barré syndrome. CASE PRESENTATION: We report the cases of two interesting patients with confirmed dengue infection who presented with complications of possible central nervous system vasculitis and cranial nerve palsy...
April 19, 2018: Journal of Medical Case Reports
S M Balaji
Purpose: The purpose of this study is to assess the outcomes of frontalis sling using fascia lata and silicone aurosling for congenital unilateral ptosis patients with poor levator function. Material and Methods: Retrospective study of archival cases from 22 patients from author's center. All the patients with unilateral ptosis with poor levator function were included excluding those having poor Bell's phenomenon and associated pathology like jaw winking, 3rd nerve misdirection, squint, impaired corneal sensitivity, and neoplastic lesions...
March 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Shinsuke Takeda, Masahiro Tatebe, Atsushi Sakai, Hitoshi Hirata
Acute compartment syndrome (ACS) is a surgical emergency that requires urgent fasciotomy to prevent irreversible sequelae. We report two cases of unidentified ACS, which did not result from traumatic injuries such as fractures or crush injury, iatrogenic injury or diseases such as haematological malignancies. Both patients complained of severe pain and swelling of their extremity. No bite marks, blisters or skin necrosis was noted. They also complained of marked symptoms of third cranial nerve injury, including divergent squint and diplopia...
April 1, 2018: BMJ Case Reports
V A Essuman, I Z Braimah, T A Ndanu, C T Ntim-Amponsah
BACKGROUND: Retinoblastoma, the commonest childhood malignant intraocular tumour, is diagnosed late, with less than 50% survival in developing countries, including Ghana. OBJECTIVES: To determine, from caretakers' perspective, contributing factors to late presentation of children with retinoblastoma. METHODS: A cross-sectional study involving questionnaire administration to consenting caretakers of consecutive children diagnosed with advanced retinoblastoma at the Eye Unit, Korle-Bu Teaching Hospital, Accra, Ghana, from September 2008-June 2011...
January 2018: West African Journal of Medicine
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