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Macular pigment optical density in young Chinese adults
Author(s) -
Tang ChurkYan,
Yip Hoishan,
Poon Mingyeung,
Yau Wailam,
Yap Maurice K. H.
Publication year - 2004
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.2004.00242.x
Subject(s) - optometry , macular degeneration , ophthalmology , pigment , optical density , medicine , optics , chemistry , physics , organic chemistry
Purpose: The purpose of this study was to determine the macular pigment optical density (MPOD) in a group of Chinese subjects using a simple customized light emitting diode‐based device. Methods: Heterochromatic flicker photometry was used in this study. With a 1° diameter circular test stimulus, MPOD was estimated by comparing the relative sensitivities to a blue light, against a green reference, between foveal and parafoveal 4° temporal locations. Fixed alternating frequencies were used. Repeatability was determined on a small group of subjects. A further group of 67 young healthy subjects provided data for MPOD norms. Results: All results were corrected to the common MPOD reference wavelength of 460 nm. The group‐averaged MPOD was 0.48 (S.D. 0.23). We found no gender difference in MPOD. The coefficient of variability was 7.2–8.0% and the coefficient of repeatability was 0.12. Conclusions: The MPOD of Chinese subjects did not differ greatly from the reported MPOD in white subjects.