The Range of Normal for Visual Fields by Flicker Fusion

Lovekin, Louise G.; Chandler, Margaret R.

doi:10.1001/archopht.1959.04220040050007

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1960

1985

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Cited by 7 publications

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“…Hylkema (1942), using a bright surround with a large test spot, found an increase in CFF towards the periphery. Similar results were reported by Phillips (1933), Ridell (1936), Miles (1950), Haycock (1954), Lovekim and Chandler (1959), Campbell and Rittler (1959) and Hartmann et al (1979).…”

Section: Introductionsupporting

confidence: 88%

Critical Fusion Frequency in the Central Visual Field

Douthwaite

Halliwell

Lomas

et al. 1985

Ophthalmic Physiologic Optic

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The critical fusion frequency (CFF) was measured across the central visual field. Stimulus parameters were adjusted to ensure an increase in CFF at the fovea. Comparison was made between the foveal and extra-foveal CFF values. The study showed that, while the CFF may be highest at the fovea when the CFF values are generally low, stimulus parameter changes that increase the CFF result in a greater increase extra-foveally. Ultimately, then, the CFF maximum shifts from the fovea to an extra-foveal area. Under the experimental conditions used in the study, the maximum occurred approximately 10 degrees from fixation.

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