Testing of remapping for reading enhancement for patients with central visual field losses

Jenny S. Ho; David S. Loshin; R. Shane Barton; Richard D. Juday

doi:10.1117/12.211991

16 June 1995 Testing of remapping for reading enhancement for patients with central visual field losses

Jenny S. Ho, David S. Loshin, R. Shane Barton, Richard D. Juday

Proceedings Volume 2488, Visual Information Processing IV; (1995) https://doi.org/10.1117/12.211991
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

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.

Citation Download Citation

Jenny S. Ho, David S. Loshin, R. Shane Barton, and Richard D. Juday "Testing of remapping for reading enhancement for patients with central visual field losses", Proc. SPIE 2488, Visual Information Processing IV, (16 June 1995); https://doi.org/10.1117/12.211991

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