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Peripheral resolution and contrast sensitivity: Effects of stimulus drift
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.
2017 (English)In: Vision Research, ISSN 0042-6989, E-ISSN 1878-5646, p. 145-149Article in journal (Refereed) Published
Abstract [en]

Optimal temporal modulation of the stimulus can improve foveal contrast sensitivity. This study evaluates the characteristics of the peripheral spatiotemporal contrast sensitivity function in normal-sighted subjects. The purpose is to identify a temporal modulation that can potentially improve the remaining peripheral visual function in subjects with central visual field loss. High contrast resolution cut-off for grating stimuli with four temporal frequencies (0, 5, 10 and 15 Hz drift) was first evaluated in the 10° nasal visual field. Resolution contrast sensitivity for all temporal frequencies was then measured at four spatial frequencies between 0.5 cycles per degree (cpd) and the measured stationary cut-off. All measurements were performed with eccentric optical correction. Similar to foveal vision, peripheral contrast sensitivity is highest for a combination of low spatial frequency and 5–10 Hz drift. At higher spatial frequencies, there was a decrease in contrast sensitivity with 15 Hz drift. Despite this decrease, the resolution cut-off did not vary largely between the different temporal frequencies tested. Additional measurements of contrast sensitivity at 0.5 cpd and resolution cut-off for stationary (0 Hz) and 7.5 Hz stimuli performed at 10, 15, 20 and 25° in the nasal visual field also showed the same characteristics across eccentricities.

Place, publisher, year, edition, pages
Elsevier, 2017. p. 145-149
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-206356DOI: 10.1016/j.visres.2017.02.002ISI: 000399865500015Scopus ID: 2-s2.0-85015676927OAI: oai:DiVA.org:kth-206356DiVA, id: diva2:1092076
Note

QC 20170503

Available from: 2017-04-29 Created: 2017-04-29 Last updated: 2017-05-23Bibliographically approved

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CiteExportLink to record
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  • apa
  • harvard1
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  • vancouver
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More styles
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  • de-DE
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Output format
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