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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/30179995/juvenile-tree-shrews-do-not-maintain-emmetropia-in-narrow-band-blue-light
#1
Timothy J Gawne, Alexander H Ward, Thomas T Norton
SIGNIFICANCE: In spectrally broad-band light, an emmetropization mechanism in post-natal eyes uses visual cues to modulate the growth of the eye to achieve and maintain near emmetropia. When we restricted available wavelengths to narrow-band blue light, juvenile tree shrews (diurnal dichromatic mammals closely related to primates) developed substantial refractive errors, suggesting that feedback from defocus-related changes in the relative activation of long- and short-wavelength-sensitive cones is essential to maintain emmetropia...
August 31, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169364/fittle-a-novel-braille-toy
#2
Tania Jain, Beula Christy, Anthony Vipin Das, Debanshu Bhaumik, PremNandhini Satgunam
SIGNIFICANCE: Toys for children with visual impairment and blindness are very limited. We have developed a three-dimensional (3D)-printed Braille puzzle with a potential for educational use. PURPOSE: This article describes the development of a novel Braille toy using 3D printing technology that potentially could be used for teaching Braille for children with blindness and/or profound visual impairment. METHODS: Fittle is a 3D-printed puzzle with embossed Braille letters...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169363/epistemological-trends-in-the-literature-on-mobile-devices-mobile-learning-and-learners-with-visual-impairments
#3
Simon Hayhoe
This study is significant because learning with mobile devices is increasing as a method of educating and training learners with visual impairments, but evaluation of its method is rare. In addition, the epistemological model used in this study is designed to improve future research designs. This article reviews the literature on the use of mobile devices by learners with visual impairments in a variety of learning environments. The study's three objectives are to pursue avenues of research in m-learning and visual impairment, stimulate debate on the nature and role of mobile technologies in the education of learners with visual impairments, and develop a debate on the best use of technologies in m-learning...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169362/a-global-public-health-perspective-facilitating-access-to-assistive-technology
#4
Rènée du Toit, Jill Keeffe, Jonathan Jackson, Diane Bell, Hasan Minto, Philip Hoare
Clinicians should not overlook vulnerable populations with limited access to assistive technology (AT), the importance of collaboration in multidisciplinary teams, advocacy for enabling environments, and supportive health systems. Resources, a model of care, and recommendations can assist clinicians in contributing to changing attitudes, expanding knowledge, and improving the lives of many.The increasing availability of innovative advances in AT can immeasurably enhance the quality of life of people with disabilities...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169361/feasibility-of-telerehabilitation-for-low-vision-satisfaction-ratings-by-providers-and-patients
#5
Ava Katherine Bittner, Patrick Yoshinaga, Angie Bowers, John D Shepherd, Tony Succar, Nicole C Ross
SIGNIFICANCE: This pilot study demonstrated feasibility and acceptability of telerehabilitation between a provider in-office and a low vision patient at home as an approach to provide follow-up care to improve reading ability with magnification devices and that would help overcome barriers related to transportation and paucity of providers. PURPOSE: A recent systematic review found no publications with results on the topic of telerehabilitation for low vision. Our goal was to perform the initial steps to develop, administer, refine, and evaluate components required to deliver follow-up low vision telerehabilitation services...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169360/utilization-and-abandonment-of-low-vision-devices-prescribed-on-a-mobile-clinic
#6
Micaela R Gobeille, Alexis G Malkin, Richard Jamara, Nicole C Ross
SIGNIFICANCE: Device utilization and abandonment for patients seen on a mobile clinic are explored. Findings are informative for resource allocation in a novel low vision rehabilitation (LVR) delivery model. This study also explores the relationships between device abandonment and LVR patient-reported functional outcomes. PURPOSE: This prospective cohort study investigated low vision device utilization and abandonment in a novel mobile clinic delivery model. METHODS: A device abandonment questionnaire was administered by telephone 3 months and 1 year after mobile clinic LVR...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169359/feasibility-of-using-bluetooth-low-energy-beacon-sensors-to-detect-magnifier-usage-by-low-vision-patients
#7
Ava Katherine Bittner, Andrew J Jacobson, Rakin Khan
SIGNIFICANCE: We demonstrated proof of concept for the potential for Bluetooth low energy beacons to reliably collect data to serve as an indicator that low vision patients are using handheld magnifiers for reading, which might be used in the future to prevent the abandonment of magnification or other assistive devices. PURPOSE: Bluetooth low energy beacons are an emerging novel technology involving tiny sensors that collect real-time, continuous, objective data, which might help to ascertain the abandonment of low vision devices in a timely manner, thus prompting a follow-up evaluation to attempt to resolve issues...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169358/subjective-and-objective-measures-of-daytime-activity-and-sleep-disturbance-in-retinitis-pigmentosa
#8
Ava Katherine Bittner, Jennifer A Haythornthwaite, Chandni Patel, Michael T Smith
SIGNIFICANCE: Objectively measured limitations in daytime activity levels appear to be inextricably linked with sleep disturbances in retinitis pigmentosa (RP) patients, as well as associated with unemployment status and central vision loss. Innovative interventional strategies should be developed to help improve these issues and overall quality of life for RP patients. PURPOSE: Novel sensor devices are emerging as valuable tools to objectively assess behavior. We used validated measures of wrist accelerometry to determine relationships between sleep, vision, and physical activity in RP subjects...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169357/field-expansion-for-acquired-monocular-vision-using-a-multiplexing-prism
#9
Jae-Hyun Jung, Eli Peli
SIGNIFICANCE: Acquired monocular vision (AMV) is a common visual field loss. Patients report mobility difficulties in walking due to collisions with objects or other pedestrians on the blind side. PURPOSE: The visual field of people with AMV extends more than 90° temporally on the side of the seeing eye but is restricted to approximately 55° nasally. We developed a novel field expansion device using a multiplexing prism (MxP) that superimposes the see-through and shifted views for true field expansion without apical scotoma...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169356/no-useful-field-expansion-with-full-field-prisms
#10
Jae-Hyun Jung, Eli Peli
SIGNIFICANCE: Full-field prisms that fill the entire spectacle eye wire have been considered as field expansion devices for homonymous hemianopia (HH) and acquired monocular vision (AMV). Although the full-field prism is used for addressing binocular dysfunction and for prism adaptation training after brain injury as treatment for spatial hemineglect, we show that the full-field prism for field expansion does not effectively expand the visual field in either HH or AMV. PURPOSE: Full-field prisms may shift a portion of the blind side to the residual seeing side...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169355/peripheral-prisms-improve-obstacle-detection-during-simulated-walking-for-patients-with-left-hemispatial-neglect-and-hemianopia
#11
Kevin E Houston, Alex R Bowers, Eli Peli, Russell L Woods
SIGNIFICANCE: The first report on the use of peripheral prisms (p-prisms) for patients with left neglect and homonymous visual field defects (HVFDs). PURPOSE: The purpose of this study was to investigate if patients with left hemispatial neglect and HVFDs benefit from p-prisms to expand the visual field and improve obstacle detection. METHODS: Patients (24 with HVFDs, 10 of whom had left neglect) viewed an animated, virtual, shopping mall corridor and reported if they would have collided with a human obstacle that appeared at various offsets up to 13...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169354/performance-of-real-world-functional-tasks-using-an-updated-oral-electronic-vision-device-in-persons-blinded-by-trauma
#12
Patricia Grant, Meesa Maeng, Tiffany Arango, Rich Hogle, Janet Szlyk, William Seiple
There is an immediate need for noninvasive therapies to improve the functional abilities of persons blinded by traumatic injury. The BrainPort Vision Pro, an updated hands-free oral electronic vision device, enables perception of visual information using the tongue as a substitute for the eye. PURPOSE: The purpose of this study was to evaluate the impact of the BrainPort Vision Pro on real-world functional task performance in persons who are profoundly blind (light perception or worse) due to traumatic injury (ocular or cortical)...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169353/preliminary-evaluation-of-a-wearable-camera-based-collision-warning-device-for-blind-individuals
#13
Shrinivas Pundlik, Matteo Tomasi, Mojtaba Moharrer, Alex R Bowers, Gang Luo
SIGNIFICANCE: This work describes a preliminary evaluation of a wearable collision warning device for blind individuals. The device was found to provide mobility benefit in subjects without (or deprived of) vision. This preliminary evaluation will facilitate further testing of this developmental stage device in more naturalistic conditions. PURPOSE: We developed a wearable video camera-based device that provided tridirectional collision warnings (right, center, and left) via differential feedback of two vibrotactile wristbands...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169352/a-vision-enhancement-system-to-improve-face-recognition-with-central-vision-loss
#14
Aurélie Calabrèse, Carlos Aguilar, Géraldine Faure, Frédéric Matonti, Louis Hoffart, Eric Castet
SIGNIFICANCE: The overall goal of this work is to validate a low vision aid system that uses gaze as a pointing tool and provides smart magnification. We conclude that smart visual enhancement techniques as well as gaze contingency should improve the efficiency of assistive technology for the visually impaired. PURPOSE: A low vision aid, using gaze-contingent visual enhancement and primarily intended to help reading with central vision loss, was recently designed and tested with simulated scotoma...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169351/comparing-haptic-pattern-matching-on-tablets-and-phones-large-screens-are-not-necessarily-better
#15
Jennifer L Tennison, Zachary S Carril, Nicholas A Giudice, Jenna L Gorlewicz
Touchscreen-based, multimodal graphics represent an area of increasing research in digital access for individuals with blindness or visual impairments; yet, little empirical research on the effects of screen size on graphical exploration exists. This work probes if and when more screen area is necessary in supporting a pattern-matching task. PURPOSE: Larger touchscreens are thought to have distinct benefit over smaller touchscreens for the amount of space available to convey graphical information nonvisually...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169350/how-people-with-low-vision-achieve-magnification-in-digital-reading
#16
Christina Granquist, Yueh-Hsun Wu, Rachel Gage, Michael D Crossland, Gordon E Legge
SIGNIFICANCE: Digital reading displays provide opportunities for enhancing accessibility of text for low vision. How are these displays used by people in their daily lives? PURPOSE: Subjects responded to an online survey concerning their vision history, reading technology, display preferences, and reading habits. Here, we report on findings concerning acuity and magnification. METHODS: The survey asked subjects to arrange a text passage for typical reading and to report viewing distance, screen dimensions, and the number of characters per line...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169349/assistive-technology-and-future-strategies-for-vision-enhancement
#17
Bradley Dougherty
No abstract text is available yet for this article.
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30169348/assistive-technology-for-vision-impairment
#18
Michael D Twa
No abstract text is available yet for this article.
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30153241/evaluation-of-an-audio-haptic-sensory-substitution-device-for-enhancing-spatial-awareness-for-the-visually-impaired
#19
Rebekka Hoffmann, Simone Spagnol, Árni Kristjánsson, Runar Unnthorsson
SIGNIFICANCE: Visually impaired participants were surprisingly fast in learning a new sensory substitution device, which allows them to detect obstacles within a 3.5-m radius and to find the optimal path in between. Within a few hours of training, participants successfully performed complex navigation as well as with the white cane. PURPOSE: Globally, millions of people live with vision impairment, yet effective assistive devices to increase their independence remain scarce...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30153240/low-vision-enhancement-with-head-mounted-video-display-systems-are-we-there-yet
#20
Ashley D Deemer, Christopher K Bradley, Nicole C Ross, Danielle M Natale, Rath Itthipanichpong, Frank S Werblin, Robert W Massof
Head-mounted video display systems and image processing as a means of enhancing low vision are ideas that have been around for more than 20 years. Recent developments in virtual and augmented reality technology and software have opened up new research opportunities that will lead to benefits for low vision patients. Since the Visionics low vision enhancement system (LVES), the first head-mounted video display LVES, was engineered 20 years ago, various other devices have come and gone with a recent resurgence of the technology over the past few years...
September 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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