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accommodative phoria

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https://www.readbyqxmd.com/read/29174394/visual-and-binocular-status-in-elementary-school-children-with-a-reading-problem
#1
Lisa W Christian, Krithika Nandakumar, Patricia K Hrynchak, Elizabeth L Irving
PURPOSE: This descriptive study provides a summary of the binocular anomalies seen in elementary school children identified with reading problems. METHODS: A retrospective chart review of all children identified with reading problems and seen by the University of Waterloo, Optometry Clinic, from September 2012 to June 2013. RESULTS: Files of 121 children (mean age 8.6 years, range 6-14 years) were reviewed. No significant refractive error was found in 81% of children...
November 21, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/29150866/the-minimum-test-battery-to-screen-for-binocular-vision-anomalies-report-3-of-the-band-study
#2
Jameel Rizwana Hussaindeen, Archayeeta Rakshit, Neeraj Kumar Singh, Meenakshi Swaminathan, Ronnie George, Suman Kapur, Mitchell Scheiman, Krishna Kumar Ramani
PURPOSE: This study aims to report the minimum test battery needed to screen non-strabismic binocular vision anomalies (NSBVAs) in a community set-up. When large numbers are to be screened we aim to identify the most useful test battery when there is no opportunity for a more comprehensive and time-consuming clinical examination. METHODS: The prevalence estimates and normative data for binocular vision parameters were estimated from the Binocular Vision Anomalies and Normative Data (BAND) study, following which cut-off estimates and receiver operating characteristic curves to identify the minimum test battery have been plotted...
November 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28540011/effectiveness-of-vision-therapy-in-school-children-with-symptomatic-convergence-insufficiency
#3
Jung Un Jang, Jung Yun Jang, Kim Tai-Hyung, Hwang Woon Moon
PURPOSE: To determine the effectiveness of vision therapy among Korean elementary school children with convergence insufficiency. METHODS: A total of 235 elementary schoolchildren, 10.13 ± 2.45 years of age, were subjected to thorough eye examination including binocular vision testing. Of them, 32 individuals with symptomatic convergence insufficiency without strabismus, amblyopia, and ocular disease were chosen to receive vision therapy via brock string, barrel card, mirror stereoscope, prism goggles, and aperture rule for a duration of 8 weeks...
April 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28348893/effect-of-illumination-on-ocular-status-modifications-induced-by-short-term-3d-tv-viewing
#4
Yuanyuan Chen, Yuwen Wang, Xinping Yu, Aiqin Xu, Jian Jiang, Hao Chen
Objectives. This study aimed to compare changes in ocular status after 3D TV viewing under three modes of illumination and thereby identify optimal illumination for 3D TV viewing. Methods. The following measures of ocular status were assessed: the accommodative response, accommodative microfluctuation, accommodative facility, relative accommodation, gradient accommodative convergence/accommodation (AC/A) ratio, phoria, and fusional vergence. The observers watched 3D television for 90 minutes through 3D shutter glasses under three illumination modes: A, complete darkness; B, back illumination (50 lx); and C, front illumination (130 lx)...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28296722/design-methodology-and-baseline-data-of-the-personalized-addition-lenses-clinical-trial-pact
#5
RANDOMIZED CONTROLLED TRIAL
Xinping Yu, Binjun Zhang, Jinhua Bao, Junxiao Zhang, Ge Wu, Jinling Xu, Jingwei Zheng, Björn Drobe, Hao Chen
BACKGROUND: The aim of this study was to describe the design, methods, and baseline characteristics of children enrolled in the Personalized Addition lenses Clinical Trial (PACT). PACT aims to test the myopia control efficacy of progressive addition lenses (PALs) with personalized addition values compared with standard (+2.00 D) addition PALs and single vision lenses (SVLs). METHODS: PACT is a randomized, controlled, double-masked clinical trial. Two hundred eleven myopic Chinese children (7-12 years) were enrolled and randomized into 1 of the 3 following groups: personalized addition PALs; +2...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28237412/importance-of-accommodation-and-eye-dominance-for-measuring-objective-refractions
#6
Yukari Tsuneyoshi, Kazuno Negishi, Kazuo Tsubota
PURPOSE: To explore factors affecting the difference between objective refractive data measured under monocular closed-field viewing and binocular open-field viewing. DESIGN: Prospective observational case series. METHODS: setting: Institutional. STUDY POPULATION: Twenty-nine healthy volunteers (58 eyes; mean age, 38.4 ± 10.0 years; range, 25-60 years). OBSERVATION PROCEDURES: Objective monocular refractions (MR) measured with the Nidek Auto Ref/Keratometer ARK-730A; objective binocular refractions (BR) and objective accommodative amplitude (AA) measured with the Grand Seiko Auto Ref/Keratometer WAM-5500; ocular dominance measured using the hole-in-the-card test; presence and magnitude of far/near (30 cm) phoria evaluated by the cover test and alternating cover test using a prism bar...
May 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28215499/near-binocular-visual-function-in-young-adult-orthokeratology-versus-soft-contact-lens-wearers
#7
Kate Gifford, Paul Gifford, Peter L Hendicott, Katrina L Schmid
PURPOSE: To compare near point binocular vision function of young adult myopes wearing orthokeratology (OK) lenses to matched single vision soft disposable contact lens (SCL) wearers. METHODS: A retrospective clinical record analysis of all OK wearers (18-30 years) presenting over an 18 month period was undertaken. Data was extracted for 17 OK wearers, with 17 SCL wearers matched for age, refractive error and duration of contact lens wear. Binocular vision data included horizontal phoria (phoria), horizontal base-in (BIFR) and base-out fusional reserves (BOFR) and accommodation accuracy (AA)...
February 15, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28095087/binocular-and-accommodative-characteristics-in-a-normal-population
#8
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/28092398/rate-of-strabismus-detection-on-digital-photographs-increases-by-using-off-center-near-target
#9
Ron Maor, Joanna Holland, Vijay Tailor, Marina Banteka, Payal Khandelwal, Selina Glaze, Simon Barnard, Yuval Yashiv, Annegret H Dahlmann-Noor
PURPOSE: To increase the detection rate of strabismus on digital photographs, with the ultimate aim of developing a new automated strabismus detection algorithm. METHODS: In this prospective case series, the authors acquired digital face photographs of 409 children with manifest or latent strabismus, using a 14-million-pixel camera with CCD image sensor. Of the last 52 enrolled, 34 image sets were selected for this study: 29 with manifest and 5 with latent strabismus...
March 1, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28027276/accommodation-and-phoria-in-children-wearing-multifocal-contact-lenses
#10
RANDOMIZED CONTROLLED TRIAL
Celia R Gong, David Troilo, Kathryn Richdale
PURPOSE: To determine the effect of multifocal contact lenses on accommodation and phoria in children. METHODS: This was a prospective, non-dispensing, randomized, crossover, single-visit study. Myopic children with normal accommodation and binocularity and no history of myopia control treatment were enrolled and fitted with CooperVision Biofinity single vision (SV) and multifocal (MF, +2.50D center distance add) contact lenses. Accommodative responses (photorefraction) and phorias (modified Thorington) were measured at four distances (>3 m, 100 cm, 40 cm, 25 cm)...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27873014/binocular-function-changes-produced-in-response-to-overnight-orthokeratology
#11
Gema Felipe-Marquez, María Nombela-Palomo, Catalina Palomo-Álvarez, Isabel Cacho, Amelia Nieto-Bona
PURPOSE: To analyze the binocular function changes produced on subjects undergoing overnight orthokeratology (OK) treatment over short-term (3 months) and long-term (3 years) wear. METHODS: A prospective, longitudinal study on young adult subjects with low to moderate myopia was carried out. Binocular function was assessed by the following sequence of tests: Distance and near horizontal phoria (Von Graefe technique), distance and near horizontal vergence ranges (Risley rotary prisms), accommodative convergence/accommodation (AC/A) ratio (gradient method) and the near point of convergence (standard push-up technique)...
January 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27796049/binocular-vision-anomalies-and-normative-data-band-in-tamil-nadu-report-1
#12
Jameel Rizwana Hussaindeen, Archayeeta Rakshit, Neeraj Kumar Singh, Meenakshi Swaminathan, Ronnie George, Suman Kapur, Mitchell Scheiman, Krishna Kumar Ramani
BACKGROUND: This population-based, cross-sectional study was designed to determine normative data for binocular vision and accommodative testing in rural and urban populations of Tamil Nadu. METHODS: A sample of 936 was determined, based on a previous pilot study. The epidemiological field work included a comprehensive eye examination and a binocular vision and accommodative assessment carried out in a total of four public schools, two each in the rural and urban arms of Chennai...
May 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27341089/short-term-adaptation-of-accommodative-responses-in-myopes-fitted-with-multifocal-contact-lenses
#13
Jerome Ozkan, Cathleen Fedtke, Jiyoon Chung, Varghese Thomas, Ravi Chandra Bakaraju
OBJECTIVES: To investigate whether adaptation of accommodative responses occurred in non-presbyopic myopes fitted with four multifocal contact lens (MFCL) designs. METHODS: Prospective, subject-masked clinical investigation comprising 40 experienced myopic lens wearers (18-25 years) fitted bilaterally with single-vision (SV) control lens (Air Optix Aqua [Alcon, Fort Worth, TX]) and randomized to two of four test MFCL (Proclear MFCL [Distance and Near] [CooperVision, Pleasanton, CA], Air Optix Aqua MFCL, Purevision MFCL [Bausch & Lomb, Rochester, NY])...
June 20, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/26889821/visual-dysfunctions-at-different-stages-after-blast-and-non-blast-mild-traumatic-brain-injury
#14
COMPARATIVE STUDY
José E Capó-Aponte, Kendra L Jorgensen-Wagers, Josue A Sosa, David V Walsh, Gregory L Goodrich, Leonard A Temme, Daniel W Riggs
PURPOSE: To assess the prevalence of visual dysfunctions and associated symptoms in war fighters at different stages after non-blast- or blast-induced mild traumatic brain injury (mTBI). METHODS: A comprehensive retrospective review of the electronic health records of 500 U.S. military personnel with a diagnosis of deployment-related mTBI who received eye care at the Landstuhl Regional Medical Center. For analysis, the data were grouped by mechanism of injury, and each group was further divided in three subgroups based on the number of days between injury and initial eye examination...
January 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/26808382/effects-of-near-addition-lenses-and-prisms-on-accommodative-microfluctuations-in-chinese-children
#15
Huiling Lin, Björn Drobe, Wanqing Jin, Meng Lin, Yunyun Chen, Hao Chen
PURPOSE: To investigate the effects of different near addition lenses and prisms on accommodative microfluctuations (AMFs) in Chinese early-onset myopic (EOM) and emmetropic (EMM) children. METHODS: Twenty-one EMM and 27 EOM children aged between 9 and 14years participated in the study. At near, 23 children were exophoric (exo, <0 Δ), and 25 were esophoric (eso, ≥0 Δ). The AMFs and phoria through multiple addition lenses (-1.00, 0, +1.00, +2.00, and +3.00D on each eye) and prisms (base-in prism power: 3 Δ, 2 Δ, 1 Δ; and base-out prism power: 1 Δ and 2 Δ on each eye) were measured at 25cm under binocular viewing conditions with a Grand Seiko WAM-5500 auto-refractor and a modified Thorington card...
May 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/26784710/myopia-control-with-bifocal-contact-lenses-a-randomized-clinical-trial
#16
RANDOMIZED CONTROLLED TRIAL
Thomas A Aller, Maria Liu, Christine F Wildsoet
PURPOSE: Most studies have reported only minimal reductions in myopia progression with bifocal or progressive multifocal spectacles, although somewhat larger, although mostly still clinically insignificant, effects have been reported in children with nearpoint esophoria and/or accommodative dysfunctions. The CONTROL study was a 1-year, prospective, randomized, clinical trial of bifocal contact lenses for control of myopia in children with eso fixation disparities at near. METHODS: Eighty-six myopic subjects, aged 8 to 18 years, were enrolled in the study after passing the screening examination...
April 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/26583790/comparison-of-near-addition-value-prescription-methods-for-myopic-children
#17
COMPARATIVE STUDY
Xinping Yu, Jinhua Bao, Björn Drobe, Wenhui Lv, Ge Wu, Jinling Xu, Hao Chen
PURPOSE: To compare personalized near addition values for myopic children that induce a reasonable phoria (Ph) (meeting Sheard's criterion) and induce a null lag of accommodation at near and to evaluate changes in these metrics after lens adaptation. METHODS: Fifty-three myopic children participated in this study. Accommodative response, Ph, and fusional amplitudes (FAs) were measured at 33 cm through multiple addition lenses (0D, +1.00D, +1.50D, +2.00D, +2.50D, +3...
January 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/26482903/acute-and-short-term-changes-in-visual-function-with-multifocal-soft-contact-lens-wear-in-young-adults
#18
Pauline Kang, Christine F Wildsoet
PURPOSE: To characterise the effects on accommodation and binocular vision in young adults of 2 distance centre multifocal soft contact lenses (MFSCLs), differing in add power. METHODS: Twenty-four young adult myopes (18-28 years; 20 females, 4 males) had baseline visual acuity, accommodation, near phoria, fixation disparity and stereopsis data collected with single vision (SV) SCLs. The same set of measurements was repeated immediately after subjects were fitted with each of two MFSCLs (with either +1...
April 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/26325955/age-related-changes-in-accommodation-predict-perceptual-tolerance-to-vergence-accommodation-conflicts-in-stereo-displays
#19
Simon Watt, Louise Ryan
Conventional stereoscopic imagery presents conflicting stimuli to vergence and accommodation. With sufficient conflict, vergence-accommodation coupling causes inaccurate responses in one or both systems, impairing stereoscopic depth perception, or preventing it altogether. We examined tolerance of stereo depth perception to stimuli presented in-front-of and behind the screen, and examined factors that might predict it, including phoria, and decreased ability to accommodate with age (presbyopia). We characterised accommodation of observers aged 20 to 68 years using the slope of the linear portion of their stimulus-response functions...
2015: Journal of Vision
https://www.readbyqxmd.com/read/25930979/contributions-of-visuo-oculomotor-abilities-to-interceptive-skills-in-sports
#20
Yaping Gao, Liping Chen, Shun-nan Yang, Haiying Wang, Jiaxin Yao, Qun Dai, Shuzhi Chang
PURPOSE: Monitoring and intercepting a fast approaching object is a critical skill for many sports. Athletes might be distinguished from nonathletes based on their ability to access various visual abilities to accomplish interceptive actions. Here, we examined whether interceptive visuomotor skills of athletes and nonathletes are differently correlated to a hierarchy of visuo-oculomotor abilities related to the perception of motion in depth. METHODS: Eighty-six athletes in interceptive sports, as well as 60 nonathletes, were recruited based on their sport performance and prior experiences...
June 2015: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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