Macular pigment assessment by motion photometry

Archives of Biochemistry and Biophysics
Jack D Moreland

Abstract

A Moreland anomaloscope was modified to measure macular pigment optical density (MPOD) profiles by motion photometry. A grating (spatial frequency 0.38 c deg(-1)), whose alternate bars were filled, respectively, with 460 nm (maximum MP absorption) and 580 nm (zero MP absorption) lights, drifted steadily at 37 degrees s(-1). The subject adjusted the 580 nm radiance to minimise perceived motion (equiluminance between 460 and 580 nm). Five or more settings were made for two foveal fields (0.9 degrees and 2.2 degrees diameter) and 11 extrafoveal annular fields (0.8 degrees -7.5 degrees eccentricity). Twenty subjects made measurements for both eyes: some with replications. MPOD profiles varied in scale (0.18-0.75 for the 0.9 degrees foveal field) and in shape. A mean profile was derived. Foveal data were optimally aligned with annular data in that profile when plotted at 0.71 of the foveal field radius. Factors that limit precision were identified, such as fixation errors foveally and Troxler's effect parafoveally.

References

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Citations

Jan 12, 2011·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Olivia HowellsHannah Bartlett
Dec 12, 2012·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Nianting TongXingwei Wu
Oct 5, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·J L BarburJ D Moreland
Oct 28, 2011·Journal of Biomedical Optics·Amani A FawziR Theodore Smith
Jan 11, 2007·Journal of Biomedical Optics·Jan van de KraatsDirk van Norren
Aug 9, 2015·Journal of Controlled Release : Official Journal of the Controlled Release Society·Kevin J McHughAna Jaklenec
Apr 26, 2008·Optometry : Journal of the American Optometric Association·Ivan Y-F Leung
Oct 12, 2004·Vision Research·Richard A BoneJorge C Gibert
Mar 17, 2006·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·François C DeloriGiovanni Staurenghi
Aug 31, 2019·Biomedical Optics Express·Dimitrios ChristarasPablo Artal
Jul 3, 2021·Nutrients·Drake W LemPinakin Gunvant Davey
Aug 11, 2021·Nutrients·Drake W LemPinakin Gunvant Davey

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