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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/28727615/multiplexing-prisms-for-field-expansion
#1
Eli Peli, Jae-Hyun Jung
PURPOSE: Prisms used for field expansion are limited by the optical scotoma at a prism apex (apical scotoma). For a patient with two functioning eyes, fitting prisms unilaterally allows the other eye to compensate for the apical scotoma. A monocular patient's field loss cannot be expanded with a conventional or Fresnel prism because of the apical scotoma. A newly invented optical device, the multiplexing prism (MxP), was developed to overcome the apical scotoma limitation in monocular field expansion...
July 19, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28727614/a-5-minute-interval-between-two-dilating-eye-drops-increases-their-effect
#2
Eric Denion, Frédérique Charlot, Guillaume Béraud
PURPOSE: Patients are usually advised to wait 5 minutes between eye drops. This delay supposedly allows the first drop not to be washed out by the second one, thereby increasing the combined effect. However, in the only experimental study conducted in humans on the concurrent administration of two different eye drops, the authors concluded that a 10-minute time interval between eye drops did not increase their combined effect. Our study was designed to address this puzzling observation...
July 19, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28727613/aberrometry-repeatability-and-agreement-with-autorefraction
#3
Mylan T Nguyen, David A Berntsen
SIGNIFICANCE: Commercially available aberrometers are essential to clinical studies evaluating refractive error and image quality. The Discovery System (Innovative Visual Systems, Elmhurst, IL) is a promising clinical instrument that allows investigators to export aberration data for research and analysis purposes. An assessment of the Discovery System's performance is essential to the interpretation of the data obtained. PURPOSE: The aims of this study were to determine the between-visit repeatability of refractive error and higher-order aberration measurements with the Discovery System and to examine between-instrument agreement of refractive error measurements with the Discovery System and Grand Seiko WAM-5500 open-field autorefractor (Grand Seiko Co...
July 19, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28708697/simultaneous-physical-and-mental-effort-alters-visual-function
#4
Jesús Vera, Raimundo Jiménez, José Antonio García, David Cárdenas
PURPOSE: Perceptual processing is sensitive to physiological changes. Thus, the homeostatic disturbances during and after exercise may alter the visual function. Here, we investigated the effect of simultaneous physical effort and two levels of cognitive demand on skills related to the visuoperceptual and motor processing. METHODS: Eighteen male regular exercisers performed 60 minutes of simultaneous physical exercise (cycling at 60 ± 5% of reserve heart rate) and cognitive effort (mental workload)...
July 14, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28692599/cavitary-choroidal-metastasis-from-clear-cell-renal-cell-carcinoma
#5
Bernadete Ayres, Tanya McClendon, Hakan Demirci
PURPOSE: To report the clinical, funduscopic, and echographic features of a choroidal metastatic tumor from a clear cell renal cell carcinoma presenting with intralesional cavitation. CASE REPORT: An 81-year-old man with history of clear cell renal cell carcinoma presented with blurred vision. A clinical examination including standardized ultrasound was performed, which revealed a choroidal mass with cystic-like cavitation. The patient underwent brachytherapy with regression of the tumor...
July 7, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28644209/an-atypical-case-of-paracentral-acute-middle-maculopathy
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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/28650386/corneal-nerve-morphology-and-tear-film-substance-p-in-diabetes
#14
Maria Markoulli, Jingjing You, Juno Kim, Carmen L Duong, Jonathan B Tolentino, Joshua Karras, Edward Lum
PURPOSE: This work aims to characterize the relationship between tear film neuropeptide substance P and the structural integrity of the sub-basal nerve plexus in diabetes. METHODS: Seventeen healthy control participants and nine participants with diabetes were recruited in this cross-sectional study. Total protein content and substance P concentrations were determined in the flush tears of participants. Corneal nerve morphology was assessed by capturing the corneal sub-basal nerve plexus using the Heidelberg Retinal Tomograph II with the Rostock Corneal Module (Heidelberg Engineering GmbH, Heidelberg, Germany) in the central cornea...
July 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28650385/identity-crisis
#15
Michael D Twa
No abstract text is available yet for this article.
July 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
#16
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
#17
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
#18
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
#19
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
#20
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
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