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Peripheral resolution and contrast sensitivity: Effects of stimulus drift
KTH Royal Institute of Technology.
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).ORCID-id: 0000-0002-8365-0601
KTH Royal Institute of Technology.
KTH Royal Institute of Technology.
2017 (Engelska)Ingår i: Vision Research, ISSN 0042-6989, E-ISSN 1878-5646, Vol. 133, s. 145-149Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
Pergamon Press, 2017. Vol. 133, s. 145-149
Nyckelord [en]
Contrast sensitivity, Drifting gratings, Peripheral vision, Spatial frequency, Temporal frequency
Nationell ämneskategori
Övrig annan medicin och hälsovetenskap
Forskningsämne
Naturvetenskap, Optometri
Identifikatorer
URN: urn:nbn:se:lnu:diva-61277DOI: 10.1016/j.visres.2017.02.002ISI: 000399865500015PubMedID: 28268102Scopus ID: 2-s2.0-85015676927OAI: oai:DiVA.org:lnu-61277DiVA, id: diva2:1080661
Forskningsfinansiär
Vetenskapsrådet, 621-2011-4094Tillgänglig från: 2017-03-10 Skapad: 2017-03-10 Senast uppdaterad: 2019-08-29Bibliografiskt granskad

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Lewis, Peter

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