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sensory strabismus

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https://www.readbyqxmd.com/read/29677347/oculomotor-status-binocular-vision-and-stereoacuity-in-a-series-of-keratoconus-subjects
#1
Rosália M S Antunes-Foschini, Jean V A L Coutinho, Eduardo M Rocha, Harley E A Bicas
Purpose: A group of keratoconus subjects (KG) and a control group (CG) were evaluated for sensory and motor status. We tried to clarify the factors (best-corrected visual acuity [BCVA]), heterophorias, fusional amplitude, anisometropia, astigmatism) that may be associated with a binocular disturbance. Methods: BCVA (logMAR) was measured. Binocular vision was checked using cover tests, striate Maddox, and a 6Δ base-down prism (simultaneous perception), a prism bar (fusion and fusional convergence break point), and Titmus Fly Test (stereopsis)...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29547011/risk-of-anterior-segment-ischemia-following-simultaneous-three-rectus-muscle-surgery-results-from-a-single-tertiary-care-centre
#2
Shailja Tibrewal, Ramesh Kekunnaya
PURPOSE: The aim of the study was to determine the risk of anterior segment ischemia (ASI) after simultaneous three rectus muscle surgery. METHODS: A retrospective cohort study was conducted. All patients who underwent simultaneous three rectus muscle surgery from January 2003 to December 2014 were included. Medical records were reviewed for signs of acute ASI in the postoperative period or presence of any late sequelae. Those patients who had pre-existing corneal pathology obscuring visualisation of anterior chamber and iris were excluded...
March 16, 2018: Strabismus
https://www.readbyqxmd.com/read/29526714/the-clinical-effect-of-surgical-timing-in-infantile-exotropia
#3
Mansooreh Bagheri, Majid Farvardin
PURPOSE: To review the association of postoperative ocular alignment, sensory outcomes, and need for reoperation after surgical management of infantile exotropia. METHODS: The clinical records of patients who presented with constant infantile exotropia of >25Δ and subsequently underwent strabismus surgery at a single center from 2004 to 2014 were reviewed retrospectively. Postoperative binocular sensory status was assessed using Worth 4-Dot and Titmus stereoacuity tests...
March 8, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29339174/the-impact-of-strabismus-surgery-on-gait-pattern-in-patients-with-congenital-or-starting-within-one-year-of-age-strabismus
#4
Enrica Di Sipio, Anna Dickmann, Irene Aprile, Marco Germanotta, Chiara Simbolotti, Annabella Salerni, Gustavo Savino, Luca Padua
Strabismus is a common visual disorder that negatively affects walking and balance. Therapeutic interventions for strabismus include strabismus surgery. Few studies investigated the relationship between strabismus surgery and postural control while, to the best of our knowledge, none has been conducted to assess the influence of strabismus surgery on gait. Therefore, the aim of this study was to evaluate the locomotion characteristics over patients with congenital or starting within one year of age strabismus, one month and three months after strabismus surgery...
March 23, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29323426/vision-in-children-with-autism-spectrum-disorder-a-critical-review
#5
REVIEW
Julie-Anne Little
Autism spectrum disorder (ASD) is a common neurodevelopmental condition with approximately 1-2 per cent prevalence in the population. The condition has lifelong effects for the individual and family, and early intervention and management helps maximise quality of life and outcomes. Many studies of vision in ASD have attempted to link the behavioural and sensory deficits in ASD with underlying visual processing. From this work, it is clear that individuals with ASD 'see' and process the world differently, but there remain gaps in our understanding...
January 11, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29199031/surgical-success-and-lateral-incomitance-following-three-muscle-surgery-for-large-angle-horizontal-strabismus
#6
Diana L Cifuentes, Stacy L Pineles, Joseph L Demer, Federico G Velez
PURPOSE: To evaluate motor alignment, motility, and sensorial outcomes of simultaneous three-muscle surgery for large-angle horizontal strabismus, with special attention to lateral incomitance and long-term success. METHODS: The medical records of consecutive patients with large-angle deviations (≥30Δ ) who underwent simultaneous surgery on three horizontal muscles to correct esotropia or exotropia were reviewed retrospectively. Successful motor alignment was defined as residual deviation of ≤10Δ and consecutive deviation in primary position of ≤4Δ , with no induced lateral incomitance >5Δ between lateral gazes...
February 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29193991/diplopia-after-strabismus-surgery
#7
REVIEW
Medha Sharma, David G Hunter
Diplopia is a disappointing and, at times, unanticipated consequence of what might otherwise be considered anatomically successful strabismus surgery. In this study, we review the existing literature regarding diplopia after strabismus surgery in the context of the senior author's experience. We divide postoperative diplopia types into cases that occur in the setting of normal binocular vision (or "normal" suppression) vs. cases that are the consequence of rare or anomalous sensorial adaptations. We then discuss how to identify patients at greatest risk based on history and preoperative testing, and we offer strategies for managing these sometimes-challenging cases...
2018: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29133438/normal-topography-and-binocularity-of-the-superior-colliculus-in-strabismus
#8
John R Economides, Brittany C Rapone, Daniel L Adams, Jonathan C Horton
In subjects with alternating strabismus, either eye can be used to saccade to visual targets. The brain must calculate the correct vector for each saccade, which will depend on the eye chosen to make it. The superior colliculus, a major midbrain center for saccade generation, was examined to determine whether the maps serving each eye were shifted to compensate for strabismus. Alternating exotropia was induced in two male macaques at age 1 month by sectioning the tendons of the medial recti. Once the animals grew to maturity, they were trained to fixate targets with either eye...
January 3, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29030680/-modern-non-cosmetic-treatment-with-botulinum-toxins
#9
REVIEW
A Straube
Botulinum toxin has been known in medical history for a long time. The first scientific investigations and thoughts on possible indications in the treatment of muscular disorders were published by the German physician and poet Justinus Kerner in 1822. The physiological effect of botulinum toxin was identified in the middle of the twentieth century and the first clinical use was reported in 1977. It was first used in ophthalmology for the correction of strabismus and some years later the therapy of blepharospasm and cervical dystonia was established...
December 2017: Der Internist
https://www.readbyqxmd.com/read/29025168/-a-model-explaining-infantile-esotropia-dissociated-strabismus-as-a-result-of-sensory-interhemispheric-dissociation-and-crossed-dominance-in-the-brainstem
#10
Marcel Paulus Ten Tusscher
Over 150 million years, modern reptiles, birds and mammals evolved. Predatory birds and mammals have eyes on the front of their heads. In these animals, binocular correspondence, voluntary eye movements, eye-hand coordination, partial decussation at the optic chiasm and cortical interhemispheric pathways could develop at the cost of a smaller visual field. The subsequent enlargement of the cerebral neocortex and the hemispheric pathways are of central importance in binocular vision, sensory fusion and infantile strabismus...
October 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28991350/neuroanatomical-structures-in-human-extraocular-muscles-and-their-potential-implication-in-the-development-of-oculomotor-disorders
#11
REVIEW
Ala Paduca, Jan Richard Bruenech
The potential role of sensory feedback from human extraocular muscles has been subjected to considerable speculation in the ophthalmic literature. Extraocular muscles pull against a fairly even load and do not initiate a stretch reflex, even when the eyes are directed toward the boundaries of their respective field of action. These unique working conditions and physiological properties have led to the notion that the sensory signal arising from receptors in extraocular muscles differs from the conventional proprioceptive signal arising from their somatic counterparts...
January 1, 2018: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28955214/straightening-the-eyes-doesn-t-rebalance-the-brain
#12
Jiawei Zhou, Yonghua Wang, Lixia Feng, Jiafeng Wang, Robert F Hess
Surgery to align the two eyes is commonly used in treating strabismus. However, the role of strabismic surgery on patients' binocular visual processing is not yet fully understood. In this study, we asked two questions: (1) Does realigning the eyes by strabismic surgery produce an immediate benefit to patients' sensory eye balance? (2) If not, is there a subsequent period of "alignment adaptation" akin to refractive adaptation where sensory benefits to binocular function accrue? Seventeen patients with strabismus (mean age: 17...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28892950/riley-day-syndrome-in-a-hispanic-infant-of-non-jewish-ashkenazi-descent
#13
Abel Ramírez-Estudillo, Gerardo González-Saldivar, Itzel Espinosa-Soto, Jesús González-Cortez, Alejandro Salcido-Montenegro
Riley-Day syndrome is an autosomal recessive sensory and autonomic neuropathy. Patients present a lack of fungiform papilla, alacrima and usually feeding difficulties. It is present almost exclusively in Ashkenazi Jewish individuals and has a poor prognosis. We describe an unusual case of Riley-Day syndrome with pseudostrabismus in a non-Ashkenazi Jewish patient. A one-year-old female infant was referred for evaluation of strabismus, absence of fungiform papillae, feeding difficulty, gastroesophageal reflux and episodes of self-mutilation...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28831303/pseudoamblyopia-in-congenital-cyclotropia
#14
Antonio Frattolillo, Filippo Tassi, Valentina Di Croce, Costantino Schiavi
PURPOSE: To study the effect of surgery on amblyopia and suppression associated with congenital cyclovertical strabismus. METHODS: The fixation pattern was investigated with microperimetry before and soon after surgery in ten consecutive children operated for congenital superior oblique palsy at the S. Martino Hospital, Belluno, Italy, between September 2014 and December 2015. Changes in visual performance in terms of best-corrected visual acuity (BCVA) and stereopsis between the day before and one week after surgery were also evaluated...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28742638/extraocular-muscle-findings-in-myasthenia-gravis-associated-treatment-resistant-ophthalmoplegia
#15
Robyn M Rautenbach, Komala Pillay, Anthony D N Murray, Jeannine M Heckmann
We report the histopathological and ultrastructural tissue analysis of extraocular muscle (EOM) obtained from a patient with seronegative myasthenia gravis (MG) with treatment-resistant ophthalmoplegia for 3.5 years. The EOM demonstrated predominantly myopathic features and ultrastructural evidence of mitochondrial dysfunction, but the most striking features were increased endomysial collagen and adipocyte replacement of muscle fibers. By contrast, control EOM from a patient undergoing strabismus surgery for a sensory exotropia in a nonseeing eye and a similar duration of deviation, showed normal muscle histology...
December 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28642003/strabismus-and-binocular-diplopia-due-to-advanced-glaucomatous-visual-field-loss
#16
Cheryl L Khanna, Jonathan M Holmes
PURPOSE: To describe a small series of patients with glaucoma whose strabismus and binocular diplopia were due to advanced visual field loss and inability to maintain sensory and motor fusion. METHODS: This study is an observational case series of 3 patients with binocular diplopia, associated with variable strabismus, which was due to advanced visual field loss. RESULTS: Specific characteristics of the strabismus associated with advanced glaucomatous visual field loss were a subjective floating second image and marked variability of the prism and alternate cover measurements...
June 20, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28532347/strabismus-and-the-oculomotor-system-insights-from-macaque-models
#17
Vallabh E Das
Disrupting binocular vision in infancy leads to strabismus and oftentimes to a variety of associated visual sensory deficits and oculomotor abnormalities. Investigation of this disorder has been aided by the development of various animal models, each of which has advantages and disadvantages. In comparison to studies of binocular visual responses in cortical structures, investigations of neural oculomotor structures that mediate the misalignment and abnormalities of eye movements have been more recent, and these studies have shown that different brain areas are intimately involved in driving several aspects of the strabismic condition, including horizontal misalignment, dissociated deviations, A and V patterns of strabismus, disconjugate eye movements, nystagmus, and fixation switch...
October 14, 2016: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28476458/-sensory-and-motor-clinical-presentation-of-congenital-retraction-syndromes-stilling-duane-and-brown-syndrome
#18
V Promelle, M Fortier, S Milazzo
INTRODUCTION: Congenital Brown syndrome and Stilling-Duane syndrome, two rare causes of strabismus are caused by fibrosis of one or more extraocular muscles. This series aims to report the clinical sensory and motor features of patients with Brown or Stilling-Duane syndrome. METHODS: Seventeen patients' records were retrospectively assessed for: the ocular deviation in primary position and in the 9 positions of gaze, head tilt, visual acuity and binocular vision...
May 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28315737/botulinum-toxin-as-an-adjunct-to-monocular-recession-resection-surgery-for-large-angle-sensory-strabismus
#19
Betül Tuğcu, Eda Sönmezay, Fadime Nuhoğlu, Hakan Özdemir, Seyhan Bahar Özkan
PURPOSE: To evaluate the result of using intraoperative botulinum toxin A (BTA) as an adjunct to monocular recession-resection surgery in the management of large-angle sensory strabismus. METHODS: The medical records of patients diagnosed with sensory strabismus with constant large-angle strabismus were reviewed retrospectively to identify those who underwent monocular recession-resection surgery combined with 5 units of BTA injection into the recessed muscle of the nonfixating eye...
April 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28260365/-ultrastructural-alteration-of-extraocular-muscle-proprioceptor-in-congenital-idiopathic-nystagmus
#20
C Y Zhang, D Y Bai, Y H Cui, S L Hu, Y Zhang, C Li, L Li
Objective: To explore the ultrastructural alteration of extraocular muscle proprioceptor in congenital idiopathic nystagmus (CIN). Methods: Case-control study. Ten extraocular muscle samples were collected from five CIN children who underwent nystagmus surgeries in Beijing Children's Hospital from March 2015 to March 2016. Another ten extraocular muscle specimens were collected from five strabismus children in surgery at the same period as normal contrast. There were 3 male patients and 2 female patients of CIN with age of 61-147 months (median age: 91 months)...
February 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
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