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Proceedings Paper

Testing of remapping for reading enhancement for patients with central visual field losses
Author(s): Jenny S. Ho; David S. Loshin; R. Shane Barton; Richard D. Juday
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Paper Abstract

Retinal pathology often results in visual field loss. Age related macular degeneration (ARMD) and Stargardt's disease (a congenital disease) typically affects the central macular region of the retina, resulting in visual field loss to the region of the retina with the highest resolution. Due to the central visual field losses, patients with ARMD and Stargardt's disease often experience difficulty in visual tasks, such as reading and facial recognition. NASA Johnson Space Center has developed an electronic remapper that can warp an image from one coordinate system to another on a television screen. The remapper can be used with patients with central visual field loss to redistribute information projecting off of the macular lesion (corresponding to the central scotoma) and onto the still functioning peripheral retina. The purpose of this research project was to investigate whether remapping of text around the central scotoma improved reading performance (increased reading rate) for patients with ARMD or Stargardt's disease. The subjects moved the text on the stage and read aloud random words of equal difficulty viewed on a closed circuit television screen. Reading speeds for normal and remapped text were obtained. Reading rates were determined for both free viewing and with stabilization of the position of the screen relative to the eye rotations. Results of these experiments are discussed.

Paper Details

Date Published: 16 June 1995
PDF: 8 pages
Proc. SPIE 2488, Visual Information Processing IV, (16 June 1995); doi: 10.1117/12.211991
Show Author Affiliations
Jenny S. Ho, Univ. of Houston (United States)
David S. Loshin, Univ. of Houston (United States)
R. Shane Barton, NASA Johnson Space Ctr. (United States)
Richard D. Juday, NASA Johnson Space Ctr. (United States)


Published in SPIE Proceedings Vol. 2488:
Visual Information Processing IV
Friedrich O. Huck; Richard D. Juday, Editor(s)

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