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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/28644209/an-atypical-case-of-paracentral-acute-middle-maculopathy
#1
Cheryl Haskes, Shannon Santapaola, Jordan Zinn
PURPOSE: This is a case presentation of paracentral acute middle maculopathy in a 33-year-old white man with borderline hyperlipidemia. Paracentral acute middle maculopathy was originally thought to be a variant of acute macular neuroretinopathy; however, it is now generally accepted that these two conditions are separate disease entities. The etiology, evolution, and pathophysiology of acute macular neuroretinopathy and paracentral acute middle maculopathy are discussed, as well as current diagnostic techniques...
June 21, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28609419/retinal-macroaneurysm-associated-with-congenital-anomalous-retinal-artery
#2
Vinod Kumar, Rinky Agarwal, Parijat Chandra
PURPOSE: Retinal arteriolar macroaneurysms are a common cause of vision loss in elderly patients with hypertension and cardiovascular disease. Their occurrence in the young, however, is not well known. The purpose of this article is to describe an unusual cause of retinal arteriolar macroaneurysm in a healthy young man. CASE REPORT: A 30-year-old man presented with preretinal hemorrhage and macular exudation due to ruptured retinal artery macroaneurysm. The patient was treated with intravitreal bevacizumab and laser photocoagulation to the macroaneurysm...
June 10, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28609418/surround-propinquity-and-tonic-accommodation
#3
Tammy Nguyen, Lawrence R Stark
PURPOSE: Previous studies of dark focus have found evidence of a propinquity response, in which subjects accommodate to the perceived distance of their surroundings despite being in absolute darkness. Their distance perception in a lighted room allows a spatial representation to persist within the darkened room. This study sought to establish the significance and magnitude of the propinquity response in a large sample of young adults, and to determine whether the propinquity response can be predicted by a subject's initial dark focus in an unknown dark room...
June 10, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28609417/visually-evoked-potential-markers-of-concussion-history-in-patients-with-convergence-insufficiency
#4
Dmitri Poltavski, Paul Lederer, Laurie Kopko Cox
PURPOSE: We investigated whether differences in the pattern visual evoked potentials exist between patients with convergence insufficiency and those with convergence insufficiency and a history of concussion using stimuli designed to differentiate between magnocellular (transient) and parvocellular (sustained) neural pathways. METHODS: Sustained stimuli included 2-rev/s, 85% contrast checkerboard patterns of 1- and 2-degree check sizes, whereas transient stimuli comprised 4-rev/s, 10% contrast vertical sinusoidal gratings with column width of 0...
June 10, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28609416/effect-of-stimulus-type-and-motion-on-smooth-pursuit-in-adults-and-children
#5
Valldeflors Vinuela-Navarro, Jonathan T Erichsen, Cathy Williams, J Margaret Woodhouse
PURPOSE: This study presents a two-degree customized animated stimulus developed to evaluate smooth pursuit in children and investigates the effect of its predetermined characteristics (stimulus type and size) in an adult population. Then, the animated stimulus is used to evaluate the impact of different pursuit motion paradigms in children. METHODS: To study the effect of animating a stimulus, eye movement recordings were obtained from 20 young adults while the customized animated stimulus and a standard dot stimulus were presented moving horizontally at a constant velocity...
June 10, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28609415/effect-of-povidone-iodine-5-on-the-cornea-vision-and-subjective-comfort
#6
William H Ridder, Caren Oquindo, Kavita Dhamdhere, James Burke
PURPOSE: To determine the effects of povidone iodine 5% (Betadine 5%) applied to the eye on visual function, corneal integrity, and subjective complaints. METHODS: Ten subjects were chosen to participate in this study (average age 40.6 ± 19.6; age range 22-68). LogMAR acuity, contrast sensitivity, corneal fluorescein staining, and subjective complaints were measured before and after 60 μl of Betadine 5% or saline were applied to one eye (eligibility visit, baseline, 5, 30, and 60 minutes and 4 and 24 hours post-application)...
June 10, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28604573/pupillometry-as-a-screening-tool-to-detect-pseudoexfoliation-syndrome
#7
Erdogan Yasar, Nilgun Yildirim, Eray Atalay, Emre Tambova, Ertugrul Colak
PURPOSE: Our objective was to evaluate the diagnostic value of a handheld pupillometer in differentiating eyes with pseudoexfoliation syndrome (PXS) from healthy controls. METHODS: This population-based, cross-sectional study was conducted in the province of Eskisehir, Turkey. Subjects 40 years of age and older were randomly recruited using stratified two-stage cluster sampling from the database of the Turkish Statistical Institute office in Eskisehir. Recruitment took place between June and October 2014...
June 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28604572/food-induced-red-eye
#8
Susan G Rodgin
PURPOSE: This article addresses the etiology of red eyes and a novel case of food-induced red eye. CASE REPORT: An 82-year-old white male patient reported 50 years of episodes of severe unilateral bulbar injection in either eye following ingestion of certain foods. Thinned scleras in this particular patient made the injection in his eyes more observable. Photodocumentation of this reaction after he ingested these foods is shown. CONCLUSIONS: It is hypothesized that this is a new explanation for an intermittent, unilateral, self-limited red eye-a food-induced red eye...
June 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28538337/developing-a-logarithmic-chinese-reading-acuity-chart
#9
Qi-Ming Han, Lin-Juan Cong, Cong Yu, Lei Liu
PURPOSE: An individual's reading ability cannot be reliably predicted from his/her letter acuity, contrast sensitivity, and visual field extent. We developed a set of Chinese reading acuity charts (C-READ) to assess the reading ability of Chinese readers, based on the collective wisdom of previously published reading acuity charts, especially the MNRead and the Radner Reading Charts. METHODS: The C-READ consists of three charts. Each consists sixteen 12-character simplified Chinese sentences crafted from first- to third-grade textbooks...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28538336/impact-of-dry-eye-symptoms-and-daily-activities-in-a-modern-office
#10
Mirjam M van Tilborg, Paul J Murphy, Katharine S Evans
PURPOSE: Modern offices and the use of electronic devices are increasing factors in work-related eye symptoms. However, symptoms of eye fatigue or dry eye sensation can be mixed and confusing. This study surveys the eye symptoms reported during a working day at modern offices to investigate the possible inhibition on daily work activities. METHODS: Two online digital surveys were sent to three different work locations, by direct e-mail. Survey A consisted of 14 questions that investigated eye symptoms experienced during daily activities at work and the impact on daily activities...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28538335/bigaussian-wavefront-model-for-normal-and-keratoconic-eyes
#11
Jos J Rozema, Pablo Rodríguez, Rafael Navarro, Carina Koppen
PURPOSE: To report bigaussian multivariate wavefront models capable of stochastically generating an unlimited amount of plausible wavefront data for either normal or keratoconic eyes. METHODS: The models use centroid wavefront data measured previously with an iTrace in 330 healthy right eyes and 122 keratoconic right eyes. These centroids were fitted to an 11th-order Zernike series, followed by principal component analysis to reduce dimensionality and remove correlations...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28538334/influence-of-optic-disc-size-on-identifying-glaucomatous-optic-neuropathy
#12
Gregory J Nixon, Ronald K Watanabe, Michael Sullivan-Mee, Anthony DeWilde, Lisa Young, G Lynn Mitchell
PURPOSE: The aim of this study was to use a large group of observers to test prior research findings that suggest optic disc size, clinical evaluation of the neuroretinal rim (ISNT rule), and practitioner characteristics influence the accuracy of differentiating normal from glaucomatous optic nerves. METHODS: Participant observers were optometrists, optometry students, and vision scientists/researchers attending the 2013 American Academy of Optometry Annual Meeting...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28538333/precision-medicine-and-the-future-of-health-care
#13
Michael D Twa
No abstract text is available yet for this article.
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28514248/foveal-curvature-and-asymmetry-assessed-using-optical-coherence-tomography
#14
Dean A VanNasdale, Amanda Eilerman, Aaron Zimmerman, Nicky Lai, Keith Ramsey, Loraine T Sinnott
PURPOSE: The aims of this study were to use cross-sectional optical coherence tomography imaging and custom curve fitting software to evaluate and model the foveal curvature as a spherical surface and to compare the radius of curvature in the horizontal and vertical meridians and test the sensitivity of this technique to anticipated meridional differences. METHODS: Six 30-degree foveal-centered radial optical coherence tomography cross-section scans were acquired in the right eye of 20 clinically normal subjects...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28514247/corneal-equilibrium-flux-as-a-function-of-corneal-surface-oxygen-tension
#15
Vicente Compañ, Marcel Aguilella-Arzo, Barry A Weissman
PURPOSE: Oxygen is essential for aerobic mammalian cell physiology. Oxygen tension (PO2) should reach a minimum at some position within the corneal stroma, and oxygen flux should be zero, by definition, at this point as well. We found the locations and magnitudes of this "corneal equilibrium flux" (xmin) and explored its physiological implications. METHODS: We used an application of the Monod kinetic model to calculate xmin for normal human cornea as anterior surface PO2 changes from 155 to 20 mmHg...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28514246/the-development-of-the-chinese-intermittent-exotropia-questionnaire
#16
Hui Zhu, Ling Shen, Chao-Qun Yuan, Shu Xu, Zhen-Hua Leng, Zhu-Jun Fu, Yun-Hua Xiao, Hu Liu
PURPOSE: The Intermittent Exotropia Questionnaire (IXTQ) is a child, proxy, and parent report of health-related quality of life specific to children with intermittent exotropia (IXT). The present study aimed to develop a Chinese-language version of the IXTQ (CIXTQ) and evaluate its validity and reliability when used in Chinese IXT children and their parents. METHODS: The IXTQ was translated into Chinese. One hundred seventy-five IXT children (2 to 17 years old) and 151 orthotropic control children (2 to 17 years old) along with one of their parents were recruited...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28514245/comparison-of-ocular-lubricant-osmolalities
#17
Etty Bitton, Carolyn Perugino, Stéphanie Charette
PURPOSE: The aim of this study was to evaluate the osmolality of commercially available ocular tear lubricants. METHODS: Thirty-seven (n = 37) ocular lubricants, measured three times each, were evaluated for osmolality using a vapor pressure osmometer (Wescor VAPRO 5520). The osmometer was calibrated before each use, and the order of the lubricants was randomized. Ambient temperature and humidity were monitored for stability. RESULTS: Of the 37 ocular lubricants tested, 35 (94...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28514244/the-safety-of-soft-contact-lenses-in-children
#18
Mark A Bullimore
PURPOSE: There is increasing interest in fitting children with soft contact lenses. This review collates data from a range of studies to estimate the incidence of complications, specifically corneal infiltrative events and microbial keratitis, in patients under the age of 18 years. METHODS: Peer-review papers were identified using PubMed and the Web of Science. A broad range of studies are summarized including large-scale epidemiological studies of contact lens-related complications, hospital-based case series, long- and short-term prospective studies, and multicenter retrospective studies...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28471879/investigating-the-short-term-effect-of-eyelid-massage-on-corneal-topography
#19
Britta H Riede-Pult, Katharine Evans, Heiko Pult
PURPOSE: The aim of this study was to evaluate the short-term effect of eyelid massage, after the use of warm compresses, on corneal topography. METHODS: Corneal topography was evaluated on 20 subjects (mean age, 47.0 [SD ±17.3] years) using the Oculus Keratograph (Oculus, Wetzlar, Germany). Corneal eccentricity (Epsilon) was compared between topography measurements before eyelid warming (using warm compresses) (T1), after eyelid warming (T2), directly after eyelid massage (T3), and 30 minutes after eyelid massage (T4)...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28452808/specific-location-of-disc-hemorrhage-is-linked-to-nerve-fiber-layer-defects
#20
Young Cheol Yoo, Joon Mo Kim, Han Seok Park, Chungkwon Yoo, Seong Hee Shim, Yu Sam Won, Ki Ho Park, Robert T Chang
PURPOSE: To investigate the relationship between retinal nerve fiber layer (RNFL) defects and the quadrant and proximal location of disc hemorrhages (DHs) in a large population examined for health screening. METHODS: A total of 168,044 subjects older than 20 years underwent a single screening ophthalmic examination with color fundus photography as part of a comprehensive health screening program. The presence and location of DHs and RNFL defects were assessed. The DH locations were defined according to the quadrant location (inferotemporal, superotemporal, inferonasal, or superonasal) and the most proximal end of DHs relative to the disc center (cup base, cup margin, disc rim, or extrapapillary region)...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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