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Optometry and Vision Science: Official Publication of the American Academy of Optometry

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https://www.readbyqxmd.com/read/28288017/task-induced-changes-in-idiopathic-infantile-nystagmus-vary-with-gaze
#1
Marzieh Salehi Fadardi, Arne C Bathke, Solomon W Harrar, Larry Allen Abel
PURPOSE: Investigations of infantile nystagmus syndrome (INS) at center or at the null position have reported that INS worsens when visual demand is combined with internal states, e.g. stress. Visual function and INS parameters such as foveation time, frequency, amplitude, and intensity can also be influenced by gaze position. We hypothesized that increases from baseline in visual demand and mental load would affect INS parameters at the null position differently than at other gaze positions...
March 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28288016/variability-in-objective-refraction-for-persons-with-down-syndrome
#2
Jason D Marsack, Ayeswarya Ravikumar, Julia S Benoit, Heather A Anderson
PURPOSE: Down syndrome (DS) is associated with ocular and cognitive sequelae, which both have the potential to influence clinical measures of refractive error. This study compares variability of autorefraction among subjects with and without DS. METHODS: Grand Seiko autorefraction was performed on 139 subjects with DS (age: 8-55, mean: 25 ± 9 yrs) and 138 controls (age: 7-59, mean: 25 ± 10 yrs). Subjects with three refraction measures per eye (DS: 113, control: 136) were included for analysis...
March 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28272192/optic-neuropathy-associated-with-primary-sj%C3%A3-gren-s-syndrome-a-case-series
#3
Eunoo Bak, Hee Kyung Yang, Jeong-Min Hwang
PURPOSE: To determine the diverse clinical features of optic neuropathy associated with primary Sjögren's syndrome in Korean patients. METHODS: Five women with acute and/or chronic optic neuropathy who were diagnosed as primary Sjögren's syndrome were retrospectively evaluated. Primary Sjögren's syndrome was diagnosed by signs and symptoms of keratoconjunctivitis sicca, positive serum anti-Ro/SSA and/or anti-La/SSB antibodies, and/or minor salivary gland biopsy...
March 7, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28234795/effects-of-light-scatter-and-blur-on-low-contrast-vision-and-disk-halo-size
#4
María Cinta Puell, Catalina Palomo-Álvarez
PURPOSE: To investigate the individual effects of forward light scatter (FLS) and refractive blur on low-contrast vision and the size of the disk halo produced in response to an external glare source. METHODS: Monocular disk halo radius, high- and low-contrast distance visual acuity (HCVA, LCVA), and contrast sensitivity (CS) were determined in 25 eyes of 25 healthy subjects under normal, FLS, and blur conditions. FLS was induced using the filter Black ProMist 2 to simulate an early cataract...
February 24, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28234794/african-american-patient-preferences-for-glaucoma-education
#5
Betsy Sleath, Scott Davis, Robyn Sayner, Delesha M Carpenter, Terence Johnson, Susan J Blalock, Alan L Robin
PURPOSE: The objectives of the study were to examine (a) the types of questions that African American patients have about glaucoma for their providers and (b) how patients' sociodemographic characteristics are associated with where and from whom they would like to learn about glaucoma and glaucoma medications. METHODS: Forty-nine adult African American patients with glaucoma were recruited at a private ophthalmology clinic where they completed a questionnaire for this cross-sectional study...
February 24, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28234793/validity-of-the-worth-4-dot-test-in-patients-with-red-green-color-vision-defect
#6
Eunoo Bak, Hee Kyung Yang, Jeong-Min Hwang
PURPOSE: The Worth four dot test uses red and green glasses for binocular dissociation, and although it has been believed that patients with red-green color vision defects cannot accurately perform the Worth four dot test, this has not been validated. Therefore, the purpose of this study was to demonstrate the validity of the Worth four dot test in patients with congenital red-green color vision defects who have normal or abnormal binocular vision. METHODS: A retrospective review of medical records was performed on 30 consecutive congenital red-green color vision defect patients who underwent the Worth four dot test...
February 24, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28099241/fmri-with-central-vision-loss-effects-of-fixation-locus-and-stimulus-type
#7
Tina Plank, Jozef Frolo, Sabine Brandl-Rühle, Agnes B Renner, Herbert Jägle, Mark W Greenlee
PURPOSE: In patients with central visual field scotomata, a large part of visual cortex is not adequately stimulated. Patients often use a new eccentric fixation area on intact peripheral retina ("preferred retinal locus"-PRL) that functions as a pseudo-fovea. We used functional magnetic resonance imaging (fMRI) to examine whether stimulating this pseudo-fovea leads to increased activation or altered activation patterns in visual cortex in comparison to stimulating a comparable peripheral area in the opposite hemifield (OppPRL)...
January 19, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28195933/mucin-balls-influence-corneal-infiltrative-events
#8
Loretta B Szczotka-Flynn, Ying Jiang, Mary Jo Stiegemeier, Donald O Mutti, Jeffrey Walline, Tawnya Wilson, Sara Debanne
PURPOSE: To determine whether mucin ball (MB) formation is protective against corneal infiltrative events (CIEs) as previously reported. METHODS: Two hundred eighty-two eligible participants were enrolled at three sites in the USA. Participants began a 1-month continuous wear run-in period with high modulus lotrafilcon A lenses to assess their ability to form MBs (phase 1). Subsequently, they were stratified by this characteristic and randomized to balafilcon A or comfilcon A lenses for 7-day extended wear and followed for 1 year (phase 2)...
January 18, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28099240/inter-relationship-of-soft-contact-lens-diameter-base-curve-radius-and-fit
#9
Graeme Young, Lee Hall, Anna Sulley, Kathrine Osborn-Lorenz, James S Wolffsohn
PURPOSE: To evaluate the inter-relationship of soft contact lens base curve radius (BC), diameter, and lens fit using a mathematical model. METHODS: A spreadsheet mathematical model was used to evaluate theoretical fitting characteristics for various combinations of soft lens BC and diameter. The designs were evaluated using ocular topography data collected from 163 UK subjects. The model evaluated lens tightness (edge strain) and on-eye diameter (horizontal corneal overlap) and assumed that acceptable values fell within the range 0 to 6% and 0...
January 18, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28079738/vision-problems-and-reduced-reading-outcomes-in-queensland-schoolchildren
#10
Shelley Hopkins, Geoff P Sampson, Peter L Hendicott, Joanne M Wood
PURPOSE: To assess the relationship between vision and reading outcomes in Indigenous and non-Indigenous schoolchildren to determine whether vision problems are associated with lower reading outcomes in these populations. METHODS: Vision testing and reading assessments were performed on 508 Indigenous and non-Indigenous schoolchildren in Queensland, Australia divided into two age groups: Grades 1 and 2 (6-7 years of age) and Grades 6 and 7 (12-13 years of age). Vision parameters measured included cycloplegic refraction, near point of convergence, heterophoria, fusional vergence range, rapid automatized naming, and visual motor integration...
January 12, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28182590/lens-opacity-and-hydrogen-sulfide-in-a-new-zealand-geothermal-area
#11
Michael N Bates, Ian L Bailey, Robert B DiMartino, Karl Pope, Julian Crane, Nick Garrett
PURPOSE: Hydrogen sulfide (H2S) is a highly toxic gas with well-established, acute irritation effects on the eye. The population of Rotorua, New Zealand, sited on an active geothermal field, has some of the highest ambient H2S exposures in the world. Evidence from ecological studies in Rotorua has suggested that H2S is associated with cataract. The purpose of the present study was, using more detailed exposure characterization, clinical examinations, and anterior eye photography, to more directly investigate this previously reported association...
January 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28027274/effect-of-accommodation-on-peripheral-eye-lengths-of-emmetropes-and-myopes
#12
Hussain Aldossari, Marwan Suheimat, David A Atchison, Katrina L Schmid
PURPOSE: To investigate the effect of accommodation on central and peripheral axial lengths in young adult emmetropes and myopes. METHODS: On-axis and peripheral axial lengths were measured with the Haag-Streit Lenstar in 83 young adult participants for 0D and 6D accommodation demands. A Badal system was used to both correct refractive errors and induce accommodation. Participants were emmetropes (n = 29, mean spherical equivalent refraction +0.35 ± 0.35D), low myopes (32, -1...
January 3, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28338565/corneal-nerve-morphology-sensitivity-and-tear-neuropeptides-in-contact-lens-wear
#13
Blanka Golebiowski, Cecilia Chao, Fiona Stapleton, Isabelle Jalbert
PURPOSE: To determine tear neuropeptide levels in contact lens wearers and non-wearers, and to examine relationships with indices of corneal innervation, tear function, and ocular discomfort. METHODS: A cross-sectional, single-visit, investigator-masked pilot study. Assessments included Ocular Comfort Index (OCI), central and mid-peripheral corneal nerve density and morphology (HRT-Rostock), corneal sensitivity (Cochet-Bonnet aesthesiometer), tear Substance P and calcitonin gene-related peptide (CGRP) concentration (ELISA), in situ tear osmolarity (TearLab), tear secretion (Phenol Red Thread), and noninvasive tear break-up time (NITBUT; Keeler Tearscope)...
April 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28338564/studying-the-retinal-source-of-photophobia-by-facial-electroretinography
#14
Christopher W Tyler, Lora T Likova
PURPOSE: Photophobia is a debilitating clinical condition that disrupts the ability to use vision for everyday tasks in bright lighting conditions. The goal of the study is to develop a methodology to study the neural basis of photophobia and the contribution of the melanopic pathway to its etiology with differential chromatic responses by means of standard electroencephalographic recording equipment. METHODS: We introduce and validate the approach of recording wavelength-specific electroretinographic (ERG) responses from the face electrodes of the high-density whole-head electroencephalography recording system under light-adapted conditions...
April 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28338563/making-eye-health-a-population-imperative-putting-plans-into-action
#15
David Heath
No abstract text is available yet for this article.
April 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28338562/making-eye-health-a-population-imperative-a-vision-for-tomorrow-a-report-by-the-committee-on-public-health-approaches-to-reduce-vision-impairment-and-promote-eye-health
#16
Lori L Grover
No abstract text is available yet for this article.
April 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28338561/making-eye-health-a-population-imperative-a-question-of-priorities
#17
Michael D Twa
No abstract text is available yet for this article.
April 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28225373/outer-retinal-tubulation-a-case-series
#18
Leticia A Rousso, Julie A Rodman, Brad Sutton, Diana L Shechtman
PURPOSE: The advent of spectral domain optical coherence tomography has led to superb imaging capabilities in addition to enhanced visualization of the retinal layers. Such advancements have led to the identification of a variety of new retinal conditions, including outer retinal tubulations (ORTs). ORTs are ovoid hyporeflective spaces located in the outer retina. The pathogenesis is unclear but seems to involve sublethal injury to the photoreceptors leading to a compensatory reorganization of the photoreceptor layer with the neighboring ellipsoid zone resulting in a hyperreflective border surrounding a central lumen...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28225372/spherical-soft-contact-lens-designs-and-peripheral-defocus-in-myopic-eyes
#19
Kelly E Moore, Julia S Benoit, David A Berntsen
PURPOSE: Peripheral retinal defocus has been implicated in myopia progression. The effect of commercially available spherical soft contact lenses (SCLs) on peripheral defocus of adult myopic eyes was investigated. METHODS: Twenty-five young adults with spherical equivalent (SE) refractions between -0.50D and -6.00D were enrolled. Cycloplegic autorefraction (right eye) was measured centrally and ±20°, ±30°, and ±40° from the line of sight along the horizontal meridian using an autorefractor...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28225371/measurement-of-perceived-stress-in-age-related-macular-degeneration
#20
Bradley E Dougherty, San-San L Cooley, Frederick H Davidorf
PURPOSE: To validate the Perceived Stress Scale (PSS) in patients with age-related macular degeneration (AMD) using Rasch analysis. METHODS: Study participants with AMD were recruited from the retina service of the Department of Ophthalmology at the Ohio State University during clinical visits for treatment or observation. Visual acuity with habitual distance correction was assessed. A 10-item version of the PSS was administered in large print or by reading the items to the patient...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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