Abstract
This chapter focuses on the changes in vision experienced by patients with RP and AMD. The specific aspects of vision that are reviewed include progressive changes in central acuity, contrast sensitivity, visual field, color vision, night vision, glare, and light and dark adaptation. Emphasis is on patients’ perspectives, including the impact on functioning and performance of activities of daily living, as well as rates, patterns of vision loss, and day-to-day visual fluctuations experienced by those with retinal degenerative diseases. Several types of visual phenomena are presented, including Charles Bonnet Syndrome hallucinations in AMD, perceptual completion or filling-in of scotomas in AMD, remapping visual cortex in AMD, the preferred retinal locus in AMD, and photopsias or light show type flashes in RP. The proposed implications of these visual changes and phenomena as they apply to retinal prosthetic vision are discussed.
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Abbreviations
- AIBSE:
-
Acute idiopathic blind spot enlargement
- AMD:
-
Age-related macular degeneration
- AZOOR:
-
Acute zonal occult outer retinopathy
- CBS:
-
Charles Bonnet syndrome
- fMRI:
-
Functional magnetic resonance imaging
- GA:
-
Geographic atrophy
- MEWDS:
-
Multiple evanescent white dot syndrome
- PIC:
-
Punctate inner choroidopathy
- PRL:
-
Preferred retinal locus
- RP:
-
Retinitis pigmentosa
- VEGF:
-
Vascular endothelial growth factor
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Bittner, A.K., Sunness, J.S. (2011). Visual Perceptual Effects of Long-Standing Vision Loss. In: Dagnelie, G. (eds) Visual Prosthetics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-0754-7_5
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