Skip to main content

Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma.

Publication ,  Journal Article
Medeiros, FA; Zangwill, LM; Bowd, C; Bernd, AS; Weinreb, RN
Published in: Invest Ophthalmol Vis Sci
June 2003

PURPOSE: To apply Fourier analysis to the retinal nerve fiber layer (RNFL) thickness measurements obtained with scanning laser polarimetry (SLP), by using variable corneal compensation, and to evaluate the ability of this method to discriminate glaucomatous from normal eyes. METHODS: The study included one eye each of 55 patients with glaucoma and 52 healthy subjects. RNFL thickness measurements were obtained with a modified commercial scanning laser polarimeter (GDx Nerve Fiber Analyzer; Laser Diagnostic Technologies, Inc., San Diego, CA) so that corneal birefringence could be corrected on a subject-specific variable basis. The shape of the RNFL thickness double-hump pattern was analyzed by Fourier analysis of polarimetry data. Fourier coefficients and GDx parameters were compared between the two groups. A linear discriminant function was developed to identify and combine the most useful Fourier coefficients to separate the two groups. Receiver operating characteristic (ROC) curves were obtained for each measurement, and sensitivity values (at fixed specificities) were calculated. RESULTS: The Fourier-based linear discriminant function (LDF Fourier) resulted in a sensitivity of 84% for a specificity set at 92%. For similar specificity, the GDx software-provided parameters had sensitivities ranging from 24% to 69%. The area under ROC curve for the LDF Fourier was 0.949, significantly larger than the ROC curve area for the single best GDx software-provided parameter, superior average (0.870). CONCLUSIONS: The combination of Fourier RNFL thickness measures in an LDF, obtained using SLP with variable corneal compensation, improved the ability to discriminate glaucomatous from healthy eyes, compared with the GDx software-provided parameters.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Invest Ophthalmol Vis Sci

DOI

ISSN

0146-0404

Publication Date

June 2003

Volume

44

Issue

6

Start / End Page

2606 / 2612

Location

United States

Related Subject Headings

  • Sensitivity and Specificity
  • Retinal Ganglion Cells
  • ROC Curve
  • Optic Nerve Diseases
  • Ophthalmology & Optometry
  • Nerve Fibers
  • Middle Aged
  • Male
  • Lasers
  • Humans
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Medeiros, F. A., Zangwill, L. M., Bowd, C., Bernd, A. S., & Weinreb, R. N. (2003). Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma. Invest Ophthalmol Vis Sci, 44(6), 2606–2612. https://doi.org/10.1167/iovs.02-0814
Medeiros, Felipe A., Linda M. Zangwill, Christopher Bowd, Antje S. Bernd, and Robert N. Weinreb. “Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma.Invest Ophthalmol Vis Sci 44, no. 6 (June 2003): 2606–12. https://doi.org/10.1167/iovs.02-0814.
Medeiros FA, Zangwill LM, Bowd C, Bernd AS, Weinreb RN. Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma. Invest Ophthalmol Vis Sci. 2003 Jun;44(6):2606–12.
Medeiros, Felipe A., et al. “Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma.Invest Ophthalmol Vis Sci, vol. 44, no. 6, June 2003, pp. 2606–12. Pubmed, doi:10.1167/iovs.02-0814.
Medeiros FA, Zangwill LM, Bowd C, Bernd AS, Weinreb RN. Fourier analysis of scanning laser polarimetry measurements with variable corneal compensation in glaucoma. Invest Ophthalmol Vis Sci. 2003 Jun;44(6):2606–2612.

Published In

Invest Ophthalmol Vis Sci

DOI

ISSN

0146-0404

Publication Date

June 2003

Volume

44

Issue

6

Start / End Page

2606 / 2612

Location

United States

Related Subject Headings

  • Sensitivity and Specificity
  • Retinal Ganglion Cells
  • ROC Curve
  • Optic Nerve Diseases
  • Ophthalmology & Optometry
  • Nerve Fibers
  • Middle Aged
  • Male
  • Lasers
  • Humans