Low-Vision Patients with Age-Related Maculopathy Read RSVP Faster when Word Duration Varies According to Word Length

2001 ◽  
Vol 78 (5) ◽  
pp. 290-296 ◽  
Author(s):  
KATHY AQUILANTE ◽  
DEAN YAGER ◽  
ROBERT A. MORRIS ◽  
and FAINA KHMELNITSKY
Keyword(s):  
Word Length ◽  
Low Vision ◽  
Age Related ◽  
Word Duration

Does context or color improve object recognition in patients with low vision?

2008 ◽  
Vol 25 (5-6) ◽  
pp. 685-691 ◽  
Author(s):  
MURIEL BOUCART ◽  
PASCAL DESPRETZ ◽  
KATRINE HLADIUK ◽  
THOMAS DESMETTRE
Keyword(s):  
Image Segmentation ◽  
Object Recognition ◽  
Low Vision ◽  
Object Perception ◽  
Age Related Macular Degeneration ◽  
Natural Scenes ◽  
Gray Level ◽  
Spatial Properties ◽  
Age Related ◽  
Complex Stimuli

AbstractMost studies on people with age-related macular degeneration (AMD) have been focused on investigations of low-level processes with simple stimuli like gratings, letters, and in perception of isolated faces or objects. We investigated the ability of people with low vision to analyze more complex stimuli like photographs of natural scenes. Fifteen participants with AMD and low vision (acuity on the better eye <20/200) and 11 normally sighted age-matched controls took part in the study. They were presented with photographs of either colored or achromatic gray level scenes in one condition and with photographs of natural scenes versus isolated objects extracted from these scenes in another condition. The photographs were centrally displayed for 300 ms. In both conditions, observers were instructed to press a key when they saw a predefined target (a face or an animal). The target was present in half of the trials. Color facilitated performance in people with low vision, while equivalent performance was found for colored and achromatic pictures in normally sighted participants. Isolated objects were categorized more accurately than objects in scenes in people with low vision. No difference was found for normally sighted observers. The results suggest that spatial properties that facilitate image segmentation (e.g., color and reduced crowding) help object perception in people with low vision.

The benefits and barriers to technology acquisition: Understanding the decision-making processes of older adults with age-related vision loss (ARVL)

2016 ◽  
Vol 80 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Colleen McGrath ◽  
Arlene Astell
Keyword(s):  
Older Adults ◽  
Decision Making ◽  
Vision Loss ◽  
Low Vision ◽  
Occupational Engagement ◽  
Technology Acquisition ◽  
Age Related ◽  
Decision Making Processes ◽  
Vision Rehabilitation ◽  
Barriers To Technology

Introduction While research has investigated the factors influencing acquisition and use of technologies/assistive devices by older adults, few studies have addressed the decision-making processes regarding technology adoption of older adults with age-related vision loss. Method This critical ethnography engaged 10 older adults with age-related vision loss in narrative interviews, participant observation sessions, and semi-structured in-depth interviews to understand their decision-making processes related to the acquisition and use of low vision assistive devices to support occupational engagement. Findings Study findings focused on the benefits and barriers to technology acquisition and use. Benefits of technology acquisition included: enhanced occupational engagement; independence; safety; insurance; and validation of the disability, while the barriers to technology acquisition included: cost; training; usability; lack of awareness of low vision rehabilitation services; fear of being taken advantage of; and desire to preserve a preferred self-image. Conclusion Considering the low uptake of vision rehabilitation services, the study findings are important to occupational therapy. A better understanding of the perceived benefits and barriers to technology adoption from the perspective of older adults will help occupational therapists maximize treatment planning designed to enhance the occupational engagement of older adults aging with vision loss.

Loss of vision

2018 ◽  
Author(s):  
Susan Mollan ◽  
Alastair Denniston
Keyword(s):  
Visual Acuity ◽  
Contact Lenses ◽  
Low Vision ◽  
Visual Field Loss ◽  
Age Related Macular Degeneration ◽  
World Health ◽  
Clinical Approach ◽  
Loss Of Vision ◽  
P Loss ◽  
Age Related

Loss of vision describes a reduction in vision that cannot be corrected by glasses or contact lenses. Patients who complain of changes in their vision may have loss of visual acuity, distorted vision, or visual field loss. The World Health Organization classifies visual impairment as blindness or low vision. Blindness is defined as visual acuity of less than 3/60 in the better eye. Low vision is present when the visual acuity is less than 6/18 but equal to or better than 3/60, in the better eye. The etiology of permanent visual loss is diverse and depends on the region studied. In the UK, the leading causes are age-related macular degeneration, glaucoma, diabetic retinopathy, optic atrophy, and cataract. This chapter describes the clinical approach to the patient with loss of vision.

scholarly journals Causes of low vision and use of optical aids in the elderly

2004 ◽  
Vol 59 (4) ◽  
pp. 157-160 ◽  
Author(s):  
Keila Monteiro de Carvalho ◽  
Gelse Beatriz Martins Monteiro ◽  
Cassiano Rodrigues Isaac ◽  
Lineu Oto Shiroma ◽  
Marcela Scabello Amaral
Keyword(s):  
Macular Degeneration ◽  
Elderly Population ◽  
Low Vision ◽  
The Elderly ◽  
Cross Sectional Study ◽  
Age Related Macular Degeneration ◽  
Rehabilitation Service ◽  
Visual Rehabilitation ◽  
Cross Sectional ◽  
Age Related

PURPOSE: To determine the causes of low vision in an elderly population attended by a university visual rehabilitation service and to check for the use of prescribed optical aids. METHOD: A cross-sectional study was carried out on patients aged 60 years or over attending for the first time a university low vision service in 2001. Ophthalmic reevaluation and interview were performed by means of a structured questionnaire in 2002. RESULTS: The sample comprised 50 subjects aged between 60 and 90 years. Severe low vision (<FONT FACE=Symbol><</FONT>20/200) was present in 68.0% of patients. The main cause of low vision was age-related macular degeneration (44.0%). Regarding literacy, 16.0% were illiterate and 72.0% had completed fundamental schooling. Thirty-one patients (62.0%) had been prescribed optical aids; 54.8% of these patients stated that they use them. A majority (70.6%) held a favorable opinion of these aids. CONCLUSIONS: The main cause of low vision was age-related macular degeneration. Approximately half of those receiving prescriptions reported actually using the aids in their daily activities. Making best use of residual vision in the elderly population with visual impairment is a priority, given the social context, if the independence necessary for enhanced quality of life is to be achieved.

Réapprendre à voir le monde : Rééduquer les personnes atteintes de dégénérescence maculaire en exploitant les capacités perceptives et cognitives de la vision périphérique

2005 ◽  
Vol 24 (4) ◽  
pp. 339-352
Author(s):  
Guillaume Giraudet ◽  
Christian Corbé ◽  
Corinne Roumes
Keyword(s):  
Visual Information ◽  
Vision Loss ◽  
Peripheral Vision ◽  
Low Vision ◽  
Contextual Information ◽  
Age Related Macular Degeneration ◽  
Sensory Data ◽  
Eccentric Fixation ◽  
Age Related ◽  
Vision Care

ABSTRACTAge-related macular degeneration (ARMD) is a frequent cause of vision loss among people over age of 60. It is an aging process involving a progressive degradation of the central retina. It does not induce total blindness, since it does not affect the peripheral vision. Nonetheless, it makes difficult to read, drive, and perform all daily activities requiring fine details perception. Low-vision care consists in inducing an eccentric fixation so that relevant visual targets impact an unaffected retinal locus. It is necessary but not sufficient to enhance visual extraction. The present work aims to draw the attention of low-vision professionals to the necessity of developing new re-education tools. Beyond the perceptual re-education linked to an optimization of visual information extraction, a cognitive re-education should also be provided in order to enhance the interpretation processes. Indeed, the spatial-frequency properties of the visual world no longer match patient perceptual habits. The visually impaired person has to learn again to use these new sensory data in an optimal way. Contextual information can be a precious help in this learning process. An experimental study involving young people provides elements for another method of low-vision care, in terms of visual cognitive re-education.

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