Search: WFRF:(Venkataraman Abinaya Priya)
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Peripheral resoluti...
Peripheral resolution and contrast sensitivity : Effects of stimulus drift
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- Venkataraman, Abinaya Priya (author)
- KTH Royal Institute of Technology
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- Lewis, Peter (author)
- Linnéuniversitetet,Institutionen för medicin och optometri (MEO)
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- Unsbo, Peter (author)
- KTH,Biomedicinsk fysik och röntgenfysik,KTH Royal Institute of Technology
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- Lundström, Linda (author)
- KTH,Biomedicinsk fysik och röntgenfysik,KTH Royal Institute of Technology
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(creator_code:org_t)
- Pergamon Press, 2017
- 2017
- English.
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In: Vision Research. - : Pergamon Press. - 0042-6989 .- 1878-5646. ; 133, s. 145-149
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Abstract
Subject headings
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- Optimal temporal modulation of the stimulus can improve foveal contrast sensitivity. This studyevaluates the characteristics oftheperipheral 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 to 10 Hz drift. At higher spatial frequencies, there was a decrease in contrast sensitivity with 15 Hz drift.Despitethis 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.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Annan medicin och hälsovetenskap -- Övrig annan medicin och hälsovetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Other Medical and Health Sciences -- Other Medical and Health Sciences not elsewhere specified (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Contrast sensitivity
- Drifting gratings
- Peripheral vision
- Spatial frequency
- Temporal frequency
- Optometry
- Optometri
Publication and Content Type
- ref (subject category)
- art (subject category)
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