April 1990
Volume 31, Issue 4
Free
Articles  |   April 1990
Estimation of the short-term fluctuation from a single determination of the visual field.
Author Affiliations
  • M Schulzer
    Department of Medicine, University of British Columbia, Vancouver General Hospital, Canada.
  • R P Mills
    Department of Medicine, University of British Columbia, Vancouver General Hospital, Canada.
  • R H Hopp
    Department of Medicine, University of British Columbia, Vancouver General Hospital, Canada.
  • W Lau
    Department of Medicine, University of British Columbia, Vancouver General Hospital, Canada.
  • S M Drance
    Department of Medicine, University of British Columbia, Vancouver General Hospital, Canada.
Investigative Ophthalmology & Visual Science April 1990, Vol.31, 730-735. doi:
  • Views
  • PDF
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      M Schulzer, R P Mills, R H Hopp, W Lau, S M Drance; Estimation of the short-term fluctuation from a single determination of the visual field.. Invest. Ophthalmol. Vis. Sci. 1990;31(4):730-735.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
This content is PDF only. Please click on the PDF icon to access.
Abstract

The short-term fluctuation in regular grid threshold static fields is commonly determined from repeated observations of a number of threshold points. In this study we estimated the short-term fluctuation from a single determination of the field. Sixty-two eyes of 62 patients were tested, using three consecutive repetitions of a Humphrey 24-2 full threshold program. The resulting grid patterns were examined using a modified version of the statistical technique of trend-surface analysis. Polynomial surfaces of increasing degree were fitted to the data over the grid. The residual variances after detrending the surface correlated very well with the direct estimates based on the triple observations at each point (correlation coefficients of log-transforms of 0.8 and better). We conclude that short-term fluctuation (the square root of the variance) can be estimated with good reliability from grids of single threshold determinations.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×