A computer and video display based system for training eccentric viewing in macular degeneration with an absolute central scotoma

1995 ◽  
Vol 91 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Christina Frennesson ◽  
Peter Jakobsson ◽  
Ulla L. Nilsson
Keyword(s):  
Macular Degeneration ◽  
Central Scotoma ◽  
Video Display ◽  
Eccentric Viewing

Filling-in phenomenon in patients with age-related macular degeneration: differences regarding uni- or bilaterality of central scotoma

2003 ◽  
Vol 241 (10) ◽  
pp. 785-791 ◽  
Author(s):  
Salomon Yves Cohen ◽  
Frédéric Lamarque ◽  
Jeanne-Claude Saucet ◽  
Pierre Provent ◽  
Cecilia Langram ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Age Related Macular Degeneration ◽  
Central Scotoma ◽  
Age Related

scholarly journals Cortical Thickness Related to Compensatory Viewing Strategies in Patients With Macular Degeneration

2021 ◽  
Vol 15 ◽  
Author(s):  
Tina Plank ◽  
Edith M. A. Benkowitsch ◽  
Anton L. Beer ◽  
Sabine Brandl ◽  
Maka Malania ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Eye Movements ◽  
Macular Degeneration ◽  
Cortical Thickness ◽  
Reading Speed ◽  
Central Vision ◽  
Eccentric Viewing ◽  
Early Visual Cortex ◽  
Fixation Stability ◽  
The Right

Retinal diseases like age-related macular degeneration (AMD) or hereditary juvenile macular dystrophies (JMD) lead to a loss of central vision. Many patients compensate for this loss with a pseudo fovea in the intact peripheral retina, the so-called “preferred retinal locus” (PRL). How extensive eccentric viewing associated with central vision loss (CVL) affects brain structures responsible for visual perception and visually guided eye movements remains unknown. CVL results in a reduction of cortical gray matter in the “lesion projection zone” (LPZ) in early visual cortex, but the thickness of primary visual cortex appears to be largely preserved for eccentric-field representations. Here we explore how eccentric viewing strategies are related to cortical thickness (CT) measures in early visual cortex and in brain areas involved in the control of eye movements (frontal eye fields, FEF, supplementary eye fields, SEF, and premotor eye fields, PEF). We determined the projection zones (regions of interest, ROIs) of the PRL and of an equally peripheral area in the opposite hemifield (OppPRL) in early visual cortex (V1 and V2) in 32 patients with MD and 32 age-matched controls (19–84 years) by functional magnetic resonance imaging. Subsequently, we calculated the CT in these ROIs and compared it between PRL and OppPRL as well as between groups. Additionally, we examined the CT of FEF, SEF, and PEF and correlated it with behavioral measures like reading speed and eccentric fixation stability at the PRL. We found a significant difference between PRL and OppPRL projection zones in V1 with increased CT at the PRL, that was more pronounced in the patients, but also visible in the controls. Although the mean CT of the eye fields did not differ significantly between patients and controls, we found a trend to a positive correlation between CT in the right FEF and SEF and fixation stability in the whole patient group and between CT in the right PEF and reading speed in the JMD subgroup. The results indicate a possible association between the compensatory strategies used by patients with CVL and structural brain properties in early visual cortex and cortical eye fields.

Patient Awareness of Binocular Central Scotoma in Age-Related Macular Degeneration

2012 ◽  
Vol 89 (9) ◽  
pp. 1395-1398 ◽  
Author(s):  
Donald C. Fletcher ◽  
Ronald A. Schuchard ◽  
Laura W. Renninger
Keyword(s):  
Macular Degeneration ◽  
Age Related Macular Degeneration ◽  
Central Scotoma ◽  
Patient Awareness ◽  
Age Related

scholarly journals Microperimetry biofeedback training in a patient with bilateral myopic macular degeneration with central scotoma

2015 ◽  
Vol 63 (6) ◽  
pp. 534 ◽  
Author(s):  
Tarun Sharma ◽  
Rajiv Raman ◽  
Deepali Damkondwar ◽  
Srividya Neriyanuri
Keyword(s):  
Macular Degeneration ◽  
Biofeedback Training ◽  
Central Scotoma

The Experience of a Randomized Clinical Trial of Closed-Circuit Television versus Eccentric Viewing Training for People with Age-Related Macular Degeneration

2017 ◽  
Vol 111 (4) ◽  
pp. 354-368 ◽  
Author(s):  
Susan J. Leat ◽  
Francie Fengqin Si ◽  
Deborah Gold ◽  
Dawn Pickering ◽  
Keith Gordon ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Macular Degeneration ◽  
Vision Loss ◽  
Low Vision ◽  
Reading Speed ◽  
Optical Devices ◽  
Reading Performance ◽  
Age Related Macular Degeneration ◽  
Eccentric Viewing ◽  
Age Related

Introduction In addition to optical devices, closed-circuit televisions (CCTVs) and eccentric viewing training are both recognized interventions to improve reading performance in individuals with vision loss secondary to age-related macular degeneration. Both are relatively expensive, however, either in the cost of the device or in the amount of time personnel need to provide training. In this randomized trial, we compared the effectiveness of these two interventions. Methods Participants with age-related macular degeneration and visual acuity between 6/48 (20/160) and 6/120 (20/400) first received basic low vision care, including optical devices. At the subsequent baseline visit, they undertook a battery of measures including logMAR visual acuity; reading speed and accuracy for text in 1.3M and 1M fonts; reading information on medicine bottles, utility bills, and food packages; the NEI-VFQ; the Geriatric Depression Scale; and a reading inventory questionnaire. They were then randomized to either obtaining a CCTV for home use or eccentric viewing training over the following six weeks. Results Recruitment was more difficult than expected for this population. Of 145 patients referred, 29 met the inclusion-exclusion criteria, 14 were willing to enroll, and 10 completed the trial. For the primary outcome (reading speed for 1.3M print), there was a significant improvement between baseline and outcome for the CCTV group (p = 0.005), but not for the eccentric viewing training group (p = 0.28), and the CCTV group showed significantly greater change (p = 0.04). There was a nonsignificant improvement in reading speed for 1M text and a decrease in the amount of time taken to read utility bill information in the CCTV group. There was a significant improvement in near visual acuity with current glasses with eccentric viewing training. The other measures did not reach statistical significance. Discussion Randomized clinical trials for low vision rehabilitation, particularly in the elderly population with vision loss, are challenging, but such trials are important for the allocation of resources. This trial showed early indications of more impact on reading performance from CCTV than eccentric viewing training.

Eccentric Viewing Training in the Home Environment: Can it Improve the Performance of Activities of Daily Living?

2009 ◽  
Vol 103 (5) ◽  
pp. 277-290 ◽  
Author(s):  
Meri Vukicevic ◽  
Kerry Fitzmaurice
Keyword(s):  
Activities Of Daily Living ◽  
Macular Degeneration ◽  
Home Environment ◽  
Daily Living ◽  
Loss Of Vision ◽  
Eccentric Viewing ◽  
And Performance ◽  
Home Training ◽  
The Impact

Macular degeneration has a severe impact on a person's ability to perform activities of daily living. This study investigated the impact of in-home training in eccentric viewing on near acuity and performance of activities of daily living. The results suggest that eccentric viewing can ameliorate the impact of the loss of vision that is due to macular degeneration.

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