scholarly journals Indoor Spatial Updating With Impaired Vision

2016 ◽  
Vol 57 (15) ◽  
pp. 6757 ◽  
Author(s):  
Gordon E. Legge ◽  
Christina Granquist ◽  
Yihwa Baek ◽  
Rachel Gage
Keyword(s):  
Spatial Updating ◽  
Impaired Vision

de Haan, E. (2019). Impaired Vision: How the Visual World May Change After Brain Damage

Perception ◽  
2021 ◽  
pp. 030100662199195
Author(s):  
Frans Verstraten
Keyword(s):  
Brain Damage ◽  
Visual World ◽  
Impaired Vision

scholarly journals Geriatric Conditions and Functional Disability among a National Community-Dwelling Sample of Older Adults in India in 2017–2018

Geriatrics ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 71
Author(s):  
Supa Pengpid ◽  
Karl Peltzer
Keyword(s):  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Chronic Conditions ◽  
Sociodemographic Factors ◽  
Community Dwelling ◽  
Impaired Hearing ◽  
Major Depressive ◽  
Impaired Vision ◽  
Geriatric Conditions ◽  
Impaired Cognition

This study aimed to determine the prevalence of geriatric conditions and their association with disability in older community-dwelling adults in India. The cross-sectional sample consisted of 31,477 individuals (≥60 years) from the Longitudinal Ageing Study in India (LASI) Wave 1 in 2017–2018. Geriatric conditions assessed included injurious falls, impaired cognition, underweight, dizziness, incontinence, impaired vision and impaired hearing. More than two in five participants (44.3%) had no geriatric condition, 32.7% had one, 15.9% two and 7.1% had three or more geriatric conditions; 26.9% were underweight, 14.5% dizziness, 13.7% had impaired vision, 9.6% impaired hearing, 9.3% impaired cognition, 8.2% major depressive disorder, 5.7% injurious falls, 4.0% incontinence, and 7.4% had Activity of Daily Living (ADL) dependencies. In logistic regression analysis, adjusted by sociodemographic factors and the number of chronic conditions, we found a higher number of geriatric conditions, and a higher number of chronic conditions were associated with ADL dependencies. In a model adjusted for sociodemographic factors and the type of chronic conditions, we found that a higher number of geriatric conditions and heart disease, stroke, and bone or joint disorder were positively associated with ADL dependencies. The odds of ADL dependencies increased with impaired cognition, impaired vision, impaired hearing, and major depressive disorder. Impaired cognition, incontinence, impaired vision and major depressive disorder were positively associated with dressing, bathing, eating, transferring, and toileting dependency. In addition, impaired hearing was associated with transferring and toileting dependency. More than half of older adults in India had at least one geriatric condition. The prevalence of geriatric conditions was as high as the prevalence of chronic conditions, which in some cases were associated with disability. Geriatric conditions should be included in health care management.

Perisaccadic Mislocalization of Visual Targets by Head-Free Gaze Shifts: Visual or Motor?

2008 ◽  
Vol 100 (4) ◽  
pp. 1848-1867 ◽  
Author(s):  
Sigrid M. C. I. van Wetter ◽  
A. John van Opstal
Keyword(s):  
Target Location ◽  
Saccadic Eye Movements ◽  
Open Loop ◽  
Spatial Updating ◽  
Gaze Shifts ◽  
Gaze Shift ◽  
The Gaze ◽  
Visual Probe ◽  
Saccade Onset ◽  
Saccade Direction

Such perisaccadic mislocalization is maximal in the direction of the saccade and varies systematically with the target-saccade onset delay. We have recently shown that under head-fixed conditions perisaccadic errors do not follow the quantitative predictions of current visuomotor models that explain these mislocalizations in terms of spatial updating. These models all assume sluggish eye-movement feedback and therefore predict that errors should vary systematically with the amplitude and kinematics of the intervening saccade. Instead, we reported that errors depend only weakly on the saccade amplitude. An alternative explanation for the data is that around the saccade the perceived target location undergoes a uniform transient shift in the saccade direction, but that the oculomotor feedback is, on average, accurate. This “ visual shift” hypothesis predicts that errors will also remain insensitive to kinematic variability within much larger head-free gaze shifts. Here we test this prediction by presenting a brief visual probe near the onset of gaze saccades between 40 and 70° amplitude. According to models with inaccurate gaze-motor feedback, the expected perisaccadic errors for such gaze shifts should be as large as 30° and depend heavily on the kinematics of the gaze shift. In contrast, we found that the actual peak errors were similar to those reported for much smaller saccadic eye movements, i.e., on average about 10°, and that neither gaze-shift amplitude nor kinematics plays a systematic role. Our data further corroborate the visual origin of perisaccadic mislocalization under open-loop conditions and strengthen the idea that efferent feedback signals in the gaze-control system are fast and accurate.

scholarly journals Impaired Vision from Mental Work

BMJ ◽  
1866 ◽  
Vol 1 (278) ◽  
pp. 436-437
Author(s):  
H. Walton
Keyword(s):  
Mental Work ◽  
Impaired Vision

The visibility of controls and labels on electronic devices and their suitability for people with impaired vision

Work ◽  
2014 ◽  
Vol 47 (3) ◽  
pp. 309-317 ◽  
Author(s):  
Hsuan Tan ◽  
Mei Ying Boon ◽  
Stephen J. Dain
Keyword(s):  
Electronic Devices ◽  
Impaired Vision

Valsalva hemorrhagic retinopathy presenting as a rare cause of impaired vision after a general anesthetic—a case report and review of the literature

2015 ◽  
Vol 27 (4) ◽  
pp. 341-346 ◽  
Author(s):  
Paul S. Patane ◽  
Thomas K. Krummenacher ◽  
Rajesh C. Rao
Keyword(s):  
Case Report ◽  
Review Of The Literature ◽  
General Anesthetic ◽  
Impaired Vision
Sign in / Sign up

Export Citation Format

Share Document