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The first successful eccentric correction

Gustafsson, Jörgen LU (2001) In Visual Impairment Research 3(3). p.147-155
Abstract
This paper presents a new procedure for assessing off-axis refractive errors; in this case, oblique astigmatism. By using photorefraction to objectively measure the off-axis refraction, it is possible to identify and provide eccentric correction that results in better image quality for the preferred retinal location (PRL) or the trained retinal location (TRL). This paper describes the case of a 56-year-old man who has suffered from a large central visual field loss (CFL) for more than 30 years. He is the first case to show an improvement of visual function in the peripheral portion he uses outside the macula when eccentric correction is used. A ring target test from ring perimetry (HRP) was used to assess the residual vision. Contrast... (More)
This paper presents a new procedure for assessing off-axis refractive errors; in this case, oblique astigmatism. By using photorefraction to objectively measure the off-axis refraction, it is possible to identify and provide eccentric correction that results in better image quality for the preferred retinal location (PRL) or the trained retinal location (TRL). This paper describes the case of a 56-year-old man who has suffered from a large central visual field loss (CFL) for more than 30 years. He is the first case to show an improvement of visual function in the peripheral portion he uses outside the macula when eccentric correction is used. A ring target test from ring perimetry (HRP) was used to assess the residual vision. Contrast sensitivity function was also evaluated. The results correlated with the subjective improvement reported by the low vision person. More cases need to be evaluated and new technology developed in order to improve optical and visual assessment. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Synskador och blindhet, Optik och seende
in
Visual Impairment Research
volume
3
issue
3
pages
147 - 155
publisher
Taylor & Francis
external identifiers
  • scopus:12144249378
ISSN
1388-235X
language
English
LU publication?
yes
id
0f4dce2e-94f5-47c0-a9a8-b3b82d5464d3 (old id 754848)
date added to LUP
2007-12-28 15:16:06
date last changed
2018-04-15 04:20:29
@article{0f4dce2e-94f5-47c0-a9a8-b3b82d5464d3,
  abstract     = {This paper presents a new procedure for assessing off-axis refractive errors; in this case, oblique astigmatism. By using photorefraction to objectively measure the off-axis refraction, it is possible to identify and provide eccentric correction that results in better image quality for the preferred retinal location (PRL) or the trained retinal location (TRL). This paper describes the case of a 56-year-old man who has suffered from a large central visual field loss (CFL) for more than 30 years. He is the first case to show an improvement of visual function in the peripheral portion he uses outside the macula when eccentric correction is used. A ring target test from ring perimetry (HRP) was used to assess the residual vision. Contrast sensitivity function was also evaluated. The results correlated with the subjective improvement reported by the low vision person. More cases need to be evaluated and new technology developed in order to improve optical and visual assessment.},
  author       = {Gustafsson, Jörgen},
  issn         = {1388-235X},
  keyword      = {Synskador och blindhet,Optik och seende},
  language     = {eng},
  number       = {3},
  pages        = {147--155},
  publisher    = {Taylor & Francis},
  series       = {Visual Impairment Research},
  title        = {The first successful eccentric correction},
  volume       = {3},
  year         = {2001},
}