Fine matrix mapping of the macular region in normal subjects.

D. Wu, A. C. Bird, A. Mcnaught, M. S. Buckland, F. W. Fitzke

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Using a Humphrey field analyzer and fine matrix mapping, we measured photopic and scotopic thresholds for a blue light stimulus at 100 locations on a 9 degrees by 9 degrees matrix of 1 degree spacing centered at the fovea in 14 normal subjects. Additionally, trial lenses were used to investigate the effect of refractive error. Under photopic conditions the mean sensitivity varied by less than 1 dB over this region. Under scotopic conditions the central values were reduced in sensitivity by 15 dB compared with those at 4 degrees eccentricity. Defocus showed less than 1.2 dB loss with 1.00D of refractive error under photopic condition. The results reflect the properties of rod and cone photoreceptors and the effects of the rod mosaic near the fovea. This technique is a sensitive test of macular visual function.

Original languageEnglish
Pages (from-to)243-249
Number of pages7
Journal[Zhonghua yan ke za zhi] Chinese journal of ophthalmology
Volume31
Issue number4
StatePublished - Jul 1995

Fingerprint

Dive into the research topics of 'Fine matrix mapping of the macular region in normal subjects.'. Together they form a unique fingerprint.

Cite this