The influence of simulated light scattering on automated perimetric threshold measurements

D. K. Heuer, Douglas Anderson, R. W. Knighton, William J Feuer, M. G. Gressel

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The effect of light scattering by ocular media opacities on OCTOPUS and Humphrey perimeter threshold measurements was simulated with randomly ordered sequences of six ground-glass diffusers in the right eyes of five subjects. Threshold measurements were performed at 0°, 5°, 10°, 15°, 20°, and 25° nasally along the 180° meridian with the F4 program on an OCTOPUS perimeter, and with twice-repeated profiles on a Humphrey perimeter. The reduction in differential light sensitivity correlated well with the 2.7-dB to 16.7-dB reduction in stimulus intensity caused by the 46% to 98% scattering of incident light by the diffusers. Contrast sensitivity in the presence of a glare source (Miller-Nadler glare test) was also affected by the diffusers, such that a 75% contrast target was not visible through the strongest diffuser whereas a 5% contrast target was visible without a diffuser. Conversely, the diffusers had very little effect on visual acuity measurements that were performed with projected high-contrast targets in a darkened room. Our data suggest that even minimal light scattering, such as might be caused by a cataract that has a relatively insignificant effect on visual acuity, may influence threshold measurements.

Original languageEnglish
Pages (from-to)1247-1251
Number of pages5
JournalArchives of Ophthalmology
Volume106
Issue number9
StatePublished - Jan 1 1988

Fingerprint

Glare
Light
Visual Acuity
Photophobia
Meridians
Contrast Sensitivity
Cataract
Glass

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Heuer, D. K., Anderson, D., Knighton, R. W., Feuer, W. J., & Gressel, M. G. (1988). The influence of simulated light scattering on automated perimetric threshold measurements. Archives of Ophthalmology, 106(9), 1247-1251.

The influence of simulated light scattering on automated perimetric threshold measurements. / Heuer, D. K.; Anderson, Douglas; Knighton, R. W.; Feuer, William J; Gressel, M. G.

In: Archives of Ophthalmology, Vol. 106, No. 9, 01.01.1988, p. 1247-1251.

Research output: Contribution to journalArticle

Heuer, DK, Anderson, D, Knighton, RW, Feuer, WJ & Gressel, MG 1988, 'The influence of simulated light scattering on automated perimetric threshold measurements', Archives of Ophthalmology, vol. 106, no. 9, pp. 1247-1251.
Heuer DK, Anderson D, Knighton RW, Feuer WJ, Gressel MG. The influence of simulated light scattering on automated perimetric threshold measurements. Archives of Ophthalmology. 1988 Jan 1;106(9):1247-1251.
Heuer, D. K. ; Anderson, Douglas ; Knighton, R. W. ; Feuer, William J ; Gressel, M. G. / The influence of simulated light scattering on automated perimetric threshold measurements. In: Archives of Ophthalmology. 1988 ; Vol. 106, No. 9. pp. 1247-1251.
@article{4485713d666b41e1b7cfea2391b06286,
title = "The influence of simulated light scattering on automated perimetric threshold measurements",
abstract = "The effect of light scattering by ocular media opacities on OCTOPUS and Humphrey perimeter threshold measurements was simulated with randomly ordered sequences of six ground-glass diffusers in the right eyes of five subjects. Threshold measurements were performed at 0°, 5°, 10°, 15°, 20°, and 25° nasally along the 180° meridian with the F4 program on an OCTOPUS perimeter, and with twice-repeated profiles on a Humphrey perimeter. The reduction in differential light sensitivity correlated well with the 2.7-dB to 16.7-dB reduction in stimulus intensity caused by the 46{\%} to 98{\%} scattering of incident light by the diffusers. Contrast sensitivity in the presence of a glare source (Miller-Nadler glare test) was also affected by the diffusers, such that a 75{\%} contrast target was not visible through the strongest diffuser whereas a 5{\%} contrast target was visible without a diffuser. Conversely, the diffusers had very little effect on visual acuity measurements that were performed with projected high-contrast targets in a darkened room. Our data suggest that even minimal light scattering, such as might be caused by a cataract that has a relatively insignificant effect on visual acuity, may influence threshold measurements.",
author = "Heuer, {D. K.} and Douglas Anderson and Knighton, {R. W.} and Feuer, {William J} and Gressel, {M. G.}",
year = "1988",
month = "1",
day = "1",
language = "English",
volume = "106",
pages = "1247--1251",
journal = "JAMA Ophthalmology",
issn = "2168-6165",
publisher = "American Medical Association",
number = "9",

}

TY - JOUR

T1 - The influence of simulated light scattering on automated perimetric threshold measurements

AU - Heuer, D. K.

AU - Anderson, Douglas

AU - Knighton, R. W.

AU - Feuer, William J

AU - Gressel, M. G.

PY - 1988/1/1

Y1 - 1988/1/1

N2 - The effect of light scattering by ocular media opacities on OCTOPUS and Humphrey perimeter threshold measurements was simulated with randomly ordered sequences of six ground-glass diffusers in the right eyes of five subjects. Threshold measurements were performed at 0°, 5°, 10°, 15°, 20°, and 25° nasally along the 180° meridian with the F4 program on an OCTOPUS perimeter, and with twice-repeated profiles on a Humphrey perimeter. The reduction in differential light sensitivity correlated well with the 2.7-dB to 16.7-dB reduction in stimulus intensity caused by the 46% to 98% scattering of incident light by the diffusers. Contrast sensitivity in the presence of a glare source (Miller-Nadler glare test) was also affected by the diffusers, such that a 75% contrast target was not visible through the strongest diffuser whereas a 5% contrast target was visible without a diffuser. Conversely, the diffusers had very little effect on visual acuity measurements that were performed with projected high-contrast targets in a darkened room. Our data suggest that even minimal light scattering, such as might be caused by a cataract that has a relatively insignificant effect on visual acuity, may influence threshold measurements.

AB - The effect of light scattering by ocular media opacities on OCTOPUS and Humphrey perimeter threshold measurements was simulated with randomly ordered sequences of six ground-glass diffusers in the right eyes of five subjects. Threshold measurements were performed at 0°, 5°, 10°, 15°, 20°, and 25° nasally along the 180° meridian with the F4 program on an OCTOPUS perimeter, and with twice-repeated profiles on a Humphrey perimeter. The reduction in differential light sensitivity correlated well with the 2.7-dB to 16.7-dB reduction in stimulus intensity caused by the 46% to 98% scattering of incident light by the diffusers. Contrast sensitivity in the presence of a glare source (Miller-Nadler glare test) was also affected by the diffusers, such that a 75% contrast target was not visible through the strongest diffuser whereas a 5% contrast target was visible without a diffuser. Conversely, the diffusers had very little effect on visual acuity measurements that were performed with projected high-contrast targets in a darkened room. Our data suggest that even minimal light scattering, such as might be caused by a cataract that has a relatively insignificant effect on visual acuity, may influence threshold measurements.

UR - http://www.scopus.com/inward/record.url?scp=0023682316&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023682316&partnerID=8YFLogxK

M3 - Article

C2 - 3415549

AN - SCOPUS:0023682316

VL - 106

SP - 1247

EP - 1251

JO - JAMA Ophthalmology

JF - JAMA Ophthalmology

SN - 2168-6165

IS - 9

ER -