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Strabismus

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https://www.readbyqxmd.com/read/28574739/binocular-vision-and-squint-part-2
#1
Isolde den Tonkelaar, Harold H Henkes, Gijsbert K van Leersum
No abstract text is available yet for this article.
June 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28481654/binocular-summation-and-control-of-intermittent-exotropia
#2
Fatma Yulek, Federico G Velez, Sherwin J Isenberg, Joseph L Demer, Stacy L Pineles
BACKGROUND: Binocular summation (BiS), or improvement in binocular vision exceeding the better eye alone, is affected by strabismus. Being easily measured, BiS may be a useful indicator for subjective outcomes like stereopsis in strabismus. This study aims to investigate the relationship between BiS and measures of control of intermittent exotropia (IXT). METHODS: Patients with IXT were recruited before undergoing strabismus surgery and underwent tests of binocular and monocular high- and low-contrast visual acuity, stereopsis at distance and near, and Newcastle Control Score (NCS), a score developed by incorporating home control and clinic control criteria into a control rating scale...
May 8, 2017: Strabismus
https://www.readbyqxmd.com/read/28463606/decreased-binocular-summation-in-strabismic-amblyopes-and-effect-of-strabismus-surgery
#3
Melinda Y Chang, Joseph L Demer, Sherwin J Isenberg, Federico G Velez, Stacy L Pineles
PURPOSE: Binocular summation (BiS) occurs when binocular visual function surpasses that of the better eye alone. We sought to evaluate whether strabismic amblyopia reduces BiS more than strabismus alone, and determine whether BiS improves in strabismic amblyopes after strabismus surgery. METHODS: We prospectively recruited 15 patients with strabismic amblyopia who then underwent strabismus surgery. Thirty age-matched normal subjects and 30 non-amblyopic strabismic patients served as controls...
May 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28463578/comparison-of-naso-temporal-asymmetry-during-monocular-smooth-pursuit-optokinetic-nystagmus-and-ocular-following-response-in-strabismic-monkeys
#4
Anand C Joshi, Mehmet N Agaoglu, Vallabh E Das
PURPOSE: Under monocular viewing conditions, humans and monkeys with infantile strabismus exhibit asymmetric naso-temporal (N-T) responses to motion stimuli. The goal of this study was to compare and contrast these N-T asymmetries during 3 visually mediated eye tracking tasks-optokinetic nystagmus (OKN), smooth pursuit (SP) response, and ocular following responses (OFR). METHODS: Two adult strabismic monkeys were tested under monocular viewing conditions during OKN, SP, or OFR stimulation...
May 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28463575/the-prevalence-of-strabismus-heterophorias-and-their-associated-factors-in-underserved-rural-areas-of-iran
#5
Hassan Hashemi, Payam Nabovati, Abbasali Yekta, Hadi Ostadimoghaddam, Bardia Behnia, Mehdi Khabazkhoob
PURPOSE: To determine the prevalence of different types of strabismus and heterophoria and their associated factors in underserved rural areas of Iran. METHODS: Two rural areas in the north and southwest of Iran were randomly sampled using multistage cluster sampling. Individuals aged over 1 year, totaling 3851, were invited to participate in the study. In addition to collecting demographic data, optometric examinations were performed for each participant. Unilateral and alternating cover tests were performed at far (6 m) and near (40 cm) to detect tropia and phoria, respectively, and the magnitude of the deviation was measured using alternating cover test and prism bar...
May 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28463529/choroidal-thickness-in-strabismus-and-amblyopia-cases
#6
Leyla Niyaz, Ozlem Eski Yücel, Nurşen Arıtürk, Ozlem Terzi
PURPOSE: The aim of our study was to examine the effect of hypermetropia and anisometropic, exotropic, and esotropic amblyopia on choroidal thickness. METHODS: A prospective, cross-sectional, comparative study of 120 children under the age of 16 years was conducted. Choroidal thickness was measured in patients with hypermetropia, anisometropia, esotropia, exotropia, and controls. RESULTS: The mean subfoveal choroidal thickness in the control and hypermetropia groups was 323...
May 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28463526/long-term-surgical-outcomes-for-vertical-deviations-in-thyroid-eye-disease
#7
Lucy Barker, Kelly Mackenzie, Gill Gw Adams, Joanne Hancox
INTRODUCTION: Vertical deviations in thyroid eye disease (TED) can present a surgical challenge due to the difficulty and unpredictability of surgery and the high risk of postoperative drift towards overcorrection. This study reports the postoperative outcomes of patients who underwent adjustable vertical strabismus surgery with Vicryl sutures for thyroid eye disease. METHODS: We reviewed the records of patients seen for vertical TED strabismus surgery from January 2005 through December 2009...
May 2, 2017: Strabismus
https://www.readbyqxmd.com/read/28426269/2016-international-orthoptic-congress-burian-lecture-folklore-or-evidence
#8
Anna M Horwood
The theme of the 2016 Burian Lecture is how our understanding of strabismus has been changed by the research carried out in our laboratory in Reading over the years. Accommodation and convergence are fundamental to orthoptics, but actual responses have often been very different compared to what we had expected. This paper outlines how our laboratory's understanding of common issues such as normal development of accommodation and convergence, their linkage, intermittent strabismus, anisometropia, orthoptic exercises, and risk factors for strabismus have changed...
April 20, 2017: Strabismus
https://www.readbyqxmd.com/read/28414562/a-review-of-cochrane-systematic-reviews-of-interventions-relevant-to-orthoptic-practice
#9
Fiona J Rowe, Sue Elliott, Iris Gordon, Anupa Shah
AIM: To present an overview of the range of systematic reviews on intervention trials pertinent to orthoptic practice, produced by the Cochrane Eyes and Vision group (CEV). METHODS: We searched the 2016 Cochrane Library database (31.03.2016) to identify completed reviews and protocols of direct relevance to orthoptic practice. These reviews are currently completed and published, available on www.thecochranelibrary.com (free to UK health employees) or via the CEV website (http://eyes...
April 17, 2017: Strabismus
https://www.readbyqxmd.com/read/28276792/binocular-vision-and-squint-part-1
#10
Isolde den Tonkelaar, Harold H Henkes, Gijsbert K van Leersum
No abstract text is available yet for this article.
March 2017: Strabismus
https://www.readbyqxmd.com/read/28166436/interventions-to-reduce-myopia-progression-in-children
#11
Su Ann Tay, Sonal Farzavandi, Donald Tan
Efforts to reduce the progression of myopia in childhood are on the rise, due to an increasing incidence of myopia worldwide and its associated sight-threatening complications. Interventions are aimed at reducing myopia in childhood and include environmental considerations, spectacles, contact lenses, and pharmacological agents. We reviewed recent literature with interventions aimed at reducing myopia progression in children and found that a number of interventions were significant in reducing the progression of myopia...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28166430/effect-of-rigid-gas-permeable-contact-lenses-on-nystagmus-and-visual-function-in-hyperopic-patients-with-infantile-nystagmus-syndrome
#12
Abbas Bagheri, Hamed Abbasi, Mehdi Tavakoli, Abdolreza Sheibanizadeh, Bahareh Kheiri, Shahin Yazdani
PURPOSE: To determine the effect of rigid gas permeable contact lenses (RGPCL) on involuntary eye movements and visual function in hyperopic patients with infantile nystagmus syndrome. METHODS: This prospective interventional case series was conducted on 16 patients with infantile nystagmus and hyperopia equal or more than +0.5 D and astigmatism more than -1 D over a 2-year period. A complete ophthalmological examination including determination of best corrected visual acuity (BCVA), contrast sensitivity, and videonystagmography was performed for all patients before and after at least 3 months of RGPCL use, and the outcomes were compared...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28166429/comparison-of-rating-scales-in-the-development-of-patient-reported-outcome-measures-for-children-with-eye-disorders
#13
Sarah R Hatt, David A Leske, Suzanne M Wernimont, Eileen E Birch, Jonathan M Holmes
BACKGROUND: A rating scale is a critical component of patient-reported outcome instrument design, but the optimal rating scale format for pediatric use has not been investigated. We compared rating scale performance when administering potential questionnaire items to children with eye disorders and their parents. METHODS: Three commonly used rating scales were evaluated: frequency (never, sometimes, often, always), severity (not at all, a little, some, a lot), and difficulty (not difficult, a little difficult, difficult, very difficult)...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28165827/clinical-characteristics-treatment-and-outcome-of-trochleitis
#14
Elena Jarrín, Ángel García-García, Francisco J Hurtado-Ceña, José M Rodríguez-Sánchez
BACKGROUND AND PURPOSE: To study the clinical characteristics, treatment options, and outcome of patients with trochleitis in our population. METHODS: Retrospective review of 59 patients diagnosed with trochleitis in the Ramon y Cajal Hospital Emergency Service between 2003 and 2010. Demographic data and trochleitis features were described. The relationship between outcome and treatment options was analyzed by SPSS. RESULTS: The estimated prevalence rate of trochleitis in our area was 12 per 100,000...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28156199/influence-of-test-distance-on-stereoacuity-in-intermittent-exotropia
#15
Yukari Seki, Akemi Wakayama, Rika Takahashi, Ikumi Umebara, Fumi Tanabe, Kosuke Abe, Yoshikazu Shimomura
AIMS: To investigate influence of test distance on stereoacuity in intermittent exotropia (X[T]) using the same test conditions for both near and far distances. METHODS: Subjects were 38 consecutive patients with X(T). All the patients were between ages 6 and 15 years and had decimal visual acuity of 1.0 or better. Another inclusion criterion was presence of phoric condition at near and far distances. Stereoacuity was measured at a near distance of 40 cm and at a far distance of 5 m...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28140732/surgically-induced-necrotizing-scleritis-following-strabismus-surgery-treated-successfully-with-topical-n-acetylcysteine-in-a-child-with-congenital-fibrosis-of-extraocular-muscles-and-varadi-papp-syndrome
#16
Muralidhar Rajamani, Vidhya Nagasubramanian, Ahila Ayyavoo, Palany Raghupathy, Ramamurthy Dandapani
INTRODUCTION: Surgically induced necrotizing scleritis (SINS) is a rare but serious disorder that can develop many years after strabismus surgery. It is generally treated with high-dose steroids or immunosuppression. CASE REPORT: We describe a patient with Varadi Papp syndrome and congenital fibrosis of the extraocular muscles, who developed surgically induced necrotizing scleritis a month after strabismus surgery and was successfully managed by oral vitamin C and topical N-acetylcysteine 10%...
March 2017: Strabismus
https://www.readbyqxmd.com/read/28095087/binocular-and-accommodative-characteristics-in-a-normal-population
#17
AbbasAli Yekta, Mehdi Khabazkhoob, Hassan Hashemi, Hadi Ostadimoghaddam, Somayeh Ghasemi-Moghaddam, Javad Heravian, Asgar Doostdar, Payam Nabovati
PURPOSE: To study binocular and accommodative characteristics and their associations with age and gender in an Iranian young adult population. METHODS: In this cross-sectional study, multistage cluster sampling was done from the students of Mashhad University of Medical Sciences. All participants had visual acuity, refraction, and cover tests followed by measurements of the near point of convergence (NPC), amplitude of accommodation (AA), monocular and binocular accommodative facility (MAF and BAF) using ±2...
March 2017: Strabismus
https://www.readbyqxmd.com/read/27929727/television-video-games-in-the-treatment-of-amblyopia-in-children-aged-4-7-years
#18
Subhash Dadeya, Sonal Dangda
AIM: To investigate the role of television video games in childhood amblyopia treatment. METHOD: This prospective, randomized, interventional study included 40 patients between 4-7 years of age, with unilateral amblyopia (visual acuity in amblyopic eye between 1-0.6 LogMAR equivalents) attending the squint clinic at a tertiary eye hospital. All patients were prescribed optimal spectacle correction and occlusion therapy, i.e. full time patching according to patient's age, was initiated after six weeks...
December 2016: Strabismus
https://www.readbyqxmd.com/read/27929726/treatment-of-amblyopia-using-personalized-dosing-strategies-statistical-modelling-and-clinical-implementation
#19
Michael P Wallace, Catherine E Stewart, Merrick J Moseley, David A Stephens, Alistair R Fielder
PURPOSE: To generate a statistical model for personalizing a patient's occlusion therapy regimen. METHODS: Statistical modelling was undertaken on a combined data set of the Monitored Occlusion Treatment of Amblyopia Study (MOTAS) and the Randomized Occlusion Treatment of Amblyopia Study (ROTAS). This exercise permits the calculation of future patients' total effective dose (TED)-that predicted to achieve their best attainable visual acuity. Daily patching regimens (hours/day) can be calculated from the TED...
December 2016: Strabismus
https://www.readbyqxmd.com/read/27929725/normative-values-for-near-and-distance-clinical-tests-of-stereoacuity
#20
Marianne E F Piano, Laurence P Tidbury, Anna R O'Connor
PURPOSE: Extensive literature exists on normative stereoacuity values for younger children, but there is less information about normative stereoacuity in older children/adults. Individual stereotests cannot be used interchangeably-knowing the upper limit of normality for each test is important. This report details normative stereoacuity values for 5 near/distance stereotests drawn from a large sample of participants aged 16-40 years, across 3 studies. METHODS: Participants (n=206, mean age 22...
December 2016: Strabismus
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