Normative contrast sensitivity values for the back-lit Melbourne Edge Test and the effect of visual impairment

Frank Eperjesi*, James Wolffsohn, Jason Bowden, Genevieve Napper, Martin Rubinstein

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Background: The Melbourne Edge Test (MET) is a portable forced-choice edge detection contrast sensitivity (CS) test. The original externally illuminated paper test has been superseded by a backlit version. The aim of this study was to establish normative values for age and to assess change with visual impairment. Method: The MET was administered to 168 people with normal vision (18-93 years old) and 93 patients with visual impairment (39-97 years old). Distance visual acuity (VA) was measured with a log MAR chart. Results: In those eyes without disease, MET CS was stable until the age of 50 years (23.8 ± .7 dB) after which it decreased at a rate of ≈1.5 dB per decade. Compared with normative values, people with low vision were found to have significantly reduced CS, which could not be totally accounted for by reduced VA. Conclusions: The MET provides a quick and easy measure of CS, which highlights a reduction in visual function that may not be detectable using VA measurements. © 2004 The College of Optometrists.

Original languageEnglish
Pages (from-to)600-606
Number of pages7
JournalOphthalmic and Physiological Optics
Volume24
Issue number6
Early online date19 Oct 2004
DOIs
Publication statusPublished - Nov 2004

Keywords

  • contrast sensitivity
  • low vision
  • Melbourne Edge Test
  • normative values
  • visual impairment

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