Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1978 Jun;96(6):1082-3.
doi: 10.1001/archopht.1978.03910050602024.

Calibration error in dark adaptometer

J M Maggiano, G A Fishman, L S Evans, P Sieving, M Goldbaum

Calibration error in dark adaptometer

J M Maggiano et al. Arch Ophthalmol. 1978 Jun.

Abstract

We noted that the adjustable fixation device present on some models of the Goldmann-Weekers dark adaptometer has a calibration error that results in a consistent and predictable overestimation of retinal eccentricity. The error occurs because the eye being tested is not in the geometric center of the projection sphere. The true retinal locus may be computed by trigonometric analysis. A conversion table is available for reference.

PubMed Disclaimer

Publication types

LinkOut - more resources