WestminsterResearch

A portable instrument for measuring macular pigment with central fixation

Mellerio, John and Ahmadi-Lari, S. and van Kuijk, F.J.G.M. and Pauleikhoff, D. and Bird, A.C. and Marshall, J. (2002) A portable instrument for measuring macular pigment with central fixation. Current Eye Research, 25 (1). pp. 37-47. ISSN 0271-3683

[img]
Preview
PDF
393Kb

Official URL: http://www.journalsonline.tandf.co.uk/openurl.asp?...

Abstract

urpose: To evaluate the reliability and validity of a portable instrument for measuring macular pigment optical density. Methods: The instrument is small, uses light emitting diodes as light sources and the principles of heterochromatic flicker photometry of comparing foveal and extra-foveal minimum flicker matches. It uses central fixation for the extra-foveal matches, which subjects found easier than eccentric fixation. Subjects with healthy eyes used the instrument to measure their pigment density in a number of eye clinics. Results: The mean pigment density in 124 eyes in 124 individuals was 0.41 +/- 0.16 (mean +/- sd), there was no significant change with age but the density was less in females, those with light irides, smokers, subjects on diets low in precursor carotenoids and in those exposed to several hours of daylight every day or who used sun beds. Conclusions: The portable instrument gave valid and reliable data that confirmed published values for macular pigment. It was convenient to use in the clinic and has potential as a screening tool.

Item Type:Article
Uncontrolled Keywords:Macular pigment, screening; smoking, light exposure, age-related macular degeneration
Research Community:University of Westminster > Life Sciences, School of
ID Code:328
Deposited On:01 Dec 2005
Last Modified:11 Aug 2010 15:29

Repository Staff Only: item control page