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Effects of visual blur on microsaccades during visual exploration.
Tang, Sherry; Skelly, Peggy; Otero-Millan, Jorge; Jacobs, Jonathan; Murray, Jordan; Shaikh, Aasef G; Ghasia, Fatema F.
Afiliação
  • Tang S; Case Western Reserve University School of Medicine, USA.
  • Otero-Millan J; Vestibular and Ocular Motor Research Laboratory, Johns Hopkins University, USA.
J Eye Mov Res ; 12(6)2019 Aug 12.
Article em En | MEDLINE | ID: mdl-33828759
Microsaccades shift the image on the fovea and counteract visual fading. They also serve as an optimal sampling strategy while viewing complex visual scenes. Microsaccade production relies on the amount of retinal error or acuity demand of a visual task. The goal of this study was to assess the effects of blur induced by uncorrected refractive error on visual search. Eye movements were recorded in fourteen healthy subjects with uncorrected and corrected refractive error while they performed a) visual fixation b) blankscene viewing c) visual search (spot the difference) tasks. Microsaccades, saccades, correctly identified differences and reaction times were analyzed. The frequency of microsaccades and correctly identified differences were lower in the uncorrected refractive error during visual search. No similar change in microsaccades was seen during blank-scene viewing and gaze holding tasks. These findings suggest that visual blur, hence the precision of an image on the fovea, has an important role in calibrating the amplitude of microsaccades during visual scanning.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Eye Mov Res Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Eye Mov Res Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos