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https://www.readbyqxmd.com/read/28346616/unilateral-amblyopia-affects-two-eyes-fellow-eye-deficits-in-amblyopia
#1
Kimberly Meier, Deborah Giaschi
Unilateral amblyopia is a visual disorder that arises after selective disruption of visual input to one eye during critical periods of development. In the clinic, amblyopia is understood as poor visual acuity in an eye that was deprived of pattern vision early in life. By its nature, however, amblyopia has an adverse effect on the development of a binocular visual system and the interactions between signals from two eyes. Visual functions aside from visual acuity are impacted, and many studies have indicated compromised sensitivity in the fellow eye even though it demonstrates normal visual acuity...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28341991/altered-interhemispheric-functional-connectivity-in-patients-with-anisometropic-and-strabismic-amblyopia-a-resting-state-fmri-study
#2
Minglong Liang, Bing Xie, Hong Yang, Xuntao Yin, Hao Wang, Longhua Yu, Sheng He, Jian Wang
PURPOSE: Altered brain functional connectivity has been reported in patients with amblyopia by recent neuroimaging studies. However, relatively little is known about the alterations in interhemispheric functional connectivity in amblyopia. The present study aimed to investigate the functional connectivity patterns between homotopic regions across hemispheres in patients with anisometropic and strabismic amblyopia under resting state. METHODS: Nineteen monocular anisometropic amblyopia (AA), 18 strabismic amblyopia (SA), and 20 normal-sight controls (NC) were enrolled in this study...
March 24, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28336401/performance-of-the-spot-vision-screener-in-children-younger-than-three-years-of-age
#3
Blake D Forcina, M Millicent Peterseim, M Edward Wilson, Edward W Cheeseman, Samuel Feldman, Amanda L Marzolf, Bethany J Wolf, Rupal H Trivedi
PURPOSE: To evaluate the use of the Spot Vision Screener (Spot; Welch Allyn, Skaneateles Falls, NY) for detection of amblyopia risk factors in children aged 6 months to 3 years, as defined by the 2013 guidelines of the American Association for Pediatric Ophthalmology and Strabismus. DESIGN: Reliability analysis METHODS: In this study, children seen from 01 June 2012 to 30 April 2016 were tested with the Spot during a routine visit. Enrolled children underwent a comprehensive eye examination including cycloplegic refraction and sensorimotor testing within six months of the testing date by a pediatric ophthalmologist masked to the Spot results...
March 20, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28328978/thickness-of-retinal-layers-in-the-foveas-of-children-with-anisometropic-amblyopia
#4
Wuhe Chen, Jinling Xu, Jinjing Zhou, Zhouqun Gu, Shenghai Huang, Heming Li, Zhuoer Qin, Xinping Yu
PURPOSE: To use highly precise spectral-domain optical coherence tomography (SD-OCT) to determine whether there were structural abnormalities in the layers of different regions of the fovea in children with anisometropic amblyopia. METHODS: Eighteen children (mean age 7.8 years old; range 5-11 years) with unilateral anisometropic amblyopia and 18 age-matched control subjects participated. Foveal thickness was measured with an enhanced depth imaging system, SD-OCT and segmented into layers using custom developed software...
2017: PloS One
https://www.readbyqxmd.com/read/28319935/correction-choroidal-thickness-in-children-with-hyperopic-anisometropic-amblyopia
#5
(no author information available yet)
No abstract text is available yet for this article.
July 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28291195/-optic-nerve-pathology-in-the-structure-of-diagnostic-errors-inpatients-referred-for-cataract-surgery
#6
V V Egorov, N V Savchenko, E L Sorokin, O V Danilov
AIM: to study the frequency of misdiagnosis of cataract in patients with optic nerve pathology or amblyopia and to identify its main causes. MATERIAL AND METHODS: The study enrolled 381 patients (381 eyes) wrongly diagnosed with cataract. A standard set of eye tests was performed. In-depth examination of the macular area was done through biomicroscopy with contactless aspheric lenses of 60 and 90 D. Part of the patients underwent optical coherence tomography and static perimetry as well as examination of electrical sensitivity threshold and electrical lability of the optic nerve...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28284488/agnosic-vision-is-like-peripheral-vision-which-is-limited-by-crowding
#7
Francesca Strappini, Denis G Pelli, Enrico Di Pace, Marialuisa Martelli
Visual agnosia is a neuropsychological impairment of visual object recognition despite near-normal acuity and visual fields. A century of research has provided only a rudimentary account of the functional damage underlying this deficit. We find that the object-recognition ability of agnosic patients viewing an object directly is like that of normally-sighted observers viewing it indirectly, with peripheral vision. Thus, agnosic vision is like peripheral vision. We obtained 14 visual-object-recognition tests that are commonly used for diagnosis of visual agnosia...
February 1, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28280295/clinical-presentation-and-management-of-congenital-ptosis
#8
REVIEW
Marco Marenco, Ilaria Macchi, Iacopo Macchi, Emilio Galassi, Mina Massaro-Giordano, Alessandro Lambiase
Congenital ptosis is a rare condition characterized by lower positioning of the upper eyelid that is present at birth and is a clinical condition that is persistent if not treated. It may be unilateral or bilateral and may be associated with other ocular disorders or systemic conditions, including Marcus Gunn, Horner, and Duane syndromes. It is a benign condition but causes functional, cosmetic, and psychological problems in children. However, not all patients need to undergo surgery, and usually only patients at risk of amblyopia need a prompt surgical correction, while in other cases, surgery can be postponed...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28277444/bilateral-retrobulbar-optic-neuropathy-associated-with-golimumab
#9
Marta de Frutos-Lezaun, Aritz Bidaguren, Patricia de la Riva, Carlos F Meneses, Javier Olascoaga
We report the first documented case of retrobulbar optic neuropathy associated with golimumab. A 48-year-old man was admitted with a 3-week history of progressive visual loss of his left eye. He had received a second infusion of golimumab for ankylosing spondylitis 10 days before admission. A magnetic resonance imaging scan showed enhancement of both optic nerves and visual evoked potentials were consistent with demyelinating bilateral optic neuropathy, although visual acuity drop in the right eye could not be determined because of deep amblyopia...
March 9, 2017: Clinical Neuropharmacology
https://www.readbyqxmd.com/read/28273153/prevalence-and-association-of-refractive-anisometropia-with-near-work-habits-among-young-schoolchildren-the-evidence-from-a-population-based-study
#10
Chia-Wei Lee, Shao-You Fang, Der-Chong Tsai, Nicole Huang, Chih-Chien Hsu, Shing-Yi Chen, Allen Wen-Hsiang Chiu, Catherine Jui-Ling Liu
BACKGROUND: Lifestyle behaviour may play a role in refractive error among children, but the association between near work habits and refractive anisometropia remains unclear. METHODS: We estimated the prevalence of refractive anisometropia and examined its association with near work activities among 23,114 children in the Myopia Investigation Study in Taipei who were grade 2 elementary school students at baseline in 2013 and 2014. Baseline data on demographics, medical history, parental history and near work habits were collected by parent-administered questionnaire survey...
2017: PloS One
https://www.readbyqxmd.com/read/28272265/reduced-response-cluster-size-in-early-visual-areas-explains-the-acuity-deficit-in-amblyopia
#11
Yufeng Huang, Lixia Feng, Yifeng Zhou
Focal visual stimulation typically results in the activation of a large portion of the early visual cortex. This spread of activity is attributed to long-range lateral interactions. Such long-range interactions may serve to stabilize a visual representation or to simply modulate incoming signals, and any associated dysfunction in long-range activation may reduce sensitivity to visual information in conditions such as amblyopia. We sought to measure the dispersion of cortical activity following local visual stimulation in a group of patients with amblyopia and matched normal...
March 7, 2017: Neuroreport
https://www.readbyqxmd.com/read/28264099/temporal-binding-window-of-the-sound-induced-flash-illusion-in-amblyopia
#12
Cindy Narinesingh, Herbert C Goltz, Agnes M F Wong
Purpose: Amblyopia is a neurodevelopmental visual disorder caused by abnormal visual experience in childhood. In addition to known visual deficits, there is evidence for changes in audiovisual integration in amblyopia using explicit tasks. We examined audiovisual integration in amblyopia using an implicit task that is more relevant in a real-world context. Methods: A total of 11 participants with amblyopia and 16 controls were tested binocularly and monocularly on the sound-induced flash illusion, in which flashes and beeps are presented concurrently and the perceived number of flashes is influenced by the number of beeps...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28256489/outcome-of-strabismus-surgery-by-nonadjustable-suture-among-adults-attending-a-university-hospital-of-saudi-arabia
#13
F A Al-Wadaani
OBJECTIVE: To describe the outcome and safety of surgical treatment of Saudi adult patients with strabismus by nonadjustable suture and to evaluate the prevalence of diplopia and binocularity after strabismus correction. MATERIALS AND METHODS: Retrospective analysis of medical records of 96 patients above the age of 16-years old with strabismus seen at the King Fahd Hospital of the King Faisal University (KFUH) from July 1st, 2000 to June 30th, 2007 who were underwent strabismus correction surgery...
March 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28245489/eidolons-novel-stimuli-for-vision-research
#14
Jan Koenderink, Matteo Valsecchi, Andrea van Doorn, Johan Wagemans, Karl Gegenfurtner
Meanings and qualities are fundamental attributes of visual awareness. We propose "eidolons" as a tool for establishing equivalence classes of appearance along meaningful dimensions. The "eidolon factory" is an algorithm that generates stimuli in such a meaningful and transparent way. The algorithm allows us to focus on location, scale, and size of perceptually salient structures, proto-objects, and perhaps even semantics rather than global overall parameters, such as contrast and spatial frequency. The eidolon factory is based on models of the psychogenesis of visual awareness...
February 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28236002/functional-visual-acuity-in-patients-with-successfully-treated-amblyopia-a-pilot-study
#15
Sujin Hoshi, Takahiro Hiraoka, Junko Kotsuka, Yumiko Sato, Shinya Izumida, Atsuko Kato, Yuta Ueno, Shinichi Fukuda, Tetsuro Oshika
PURPOSE: The aim of this study was to use conventional visual acuity measurements to quantify the functional visual acuity (FVA) in eyes with successfully treated amblyopia, and to compare the findings with those for contralateral normal eyes. METHODS: Nineteen patients (7 boys, 12 girls; age 7.5 ± 2.2 years) with successfully treated unilateral amblyopia and the same conventional decimal visual acuity in both eyes (better than 1.0) were enrolled. FVA, the visual maintenance ratio (VMR), maximum and minimum visual acuity, and the average response time were recorded for both eyes of all patients using an FVA measurement system...
February 24, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28224290/pediatric-ocular-trauma-score-as-a-prognostic-tool-in-the-management-of-pediatric-traumatic-cataracts
#16
Mehul A Shah, Rupesh Agrawal, Ryan Teoh, Shreya M Shah, Kashyap Patel, Satyam Gupta, Siddharth Gosai
OBJECTIVE: To introduce and validate the pediatric ocular trauma score (POTS) - a mathematical model to predict visual outcome trauma in children with traumatic cataract METHODS: In this retrospective cohort study, medical records of consecutive children with traumatic cataracts aged 18 and below were retrieved and analysed. Data collected included age, gender, visual acuity, anterior segment and posterior segment findings, nature of surgery, treatment for amblyopia, follow-up, and final outcome was recorded on a precoded data information sheet...
February 22, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28214552/interocular-suppression-in-children-with-deprivation-amblyopia
#17
Lisa Hamm, Zidong Chen, Jinrong Li, Joanna Black, Shuan Dai, Junpeng Yuan, Minbin Yu, Benjamin Thompson
In patients with anisometropic or strabismic amblyopia, interocular suppression can be minimized by presenting high contrast stimulus elements to the amblyopic eye and lower contrast elements to the fellow eye. This suggests a structurally intact binocular visual system that is functionally suppressed. We investigated whether suppression can also be overcome by contrast balancing in children with deprivation amblyopia due to childhood cataracts. To quantify interocular contrast balance, contrast interference thresholds were measured using an established dichoptic global motion technique for 21 children with deprivation amblyopia, 14 with anisometropic or mixed strabismic/anisometropic amblyopia and 10 visually normal children (mean age mean=9...
March 5, 2017: Vision Research
https://www.readbyqxmd.com/read/28207433/long-term-clinical-course-in-eyes-with-peters-anomaly
#18
Haruna Yoshikawa, Chie Sotozono, Yoko Ikeda, Kazuhiko Mori, Morio Ueno, Shigeru Kinoshita
PURPOSE: Peters anomaly (PA) is known to be a primary cause of congenital corneal opacity. The aim of this study is to report the long-term clinical course and visual achievement of patients with PA who did not undergo keratoplasty. METHODS: This retrospective study involved 15 eyes of 9 infants with PA less than 5 months of age at initial presentation at the Kyoto Prefectural University of Medicine who were followed up without keratoplasty for more than 6 years after presentation...
February 15, 2017: Cornea
https://www.readbyqxmd.com/read/28192842/-keratoplasty-in-children-and-adolescents
#19
S J Lang, C Richter, O Richter, D Böhringer, G Geerling, T Reinhard
Background The conditions for long-term graft survival in infants and children are unfavorable, due to the different immunological features, the impaired clinical examination and the reduced compliance and treatment adherence. However, penetrating keratoplasty is often the only option to prevent amblyopia and there may be no alternative. We examined the different indications, graft survival and complications in two specialised centres. Material and Methods We identified all patients who were under the age of 18 years at the time of their penetrating keratoplasty...
February 13, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28188939/survey-of-nerve-fiber-layer-thickness-in-anisometropic-and-strabismic-amblyopia
#20
Reza Soltani Moghaddam, Abdolreza Medghalchi, Yousef Alizadeh
. To investigate the effect of anisometropic and strabismic amblyopia on the nerve fiber layer thickness. This cross-sectional study was done on 54 amblyopic subjects, equally in both strabismic and anisometropic groups. The thickness otonerve fiber layer measured in superior, inferior, nasal, temporal quadrants and as a whole in both eyes of both groups. The means of thickness were compared in amblyopic and sound eyes. In strabismus group, the average nerve fiber layer thickness of the sound eye , in superior, inferior, nasal and temporal quadrants and as a whole were 113...
January 2017: Acta Medica Iranica
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