The effect of ocular rigidity upon the characteristics of saccadic eye movements

Mohammed Alhazmi, Dirk Seidel, Lyle Gray

Research output: Contribution to journalArticle

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Abstract

The aim of this study was to determine whether variation in ocular rigidity (a quantity that describes the elastic properties of the globe) affects the characteristics of horizontal saccadic eye movements. Thirty-three young, visually healthy subjects participated with informed consent in the study. Axial length was measured using the IOLMaster ocular biometer. Ocular rigidity coefficients were determined using Schiotz tonometry. Horizontal saccades were stimulated randomly to 40° in 10° steps. Eye movements were recorded continuously at a sampling rate of 60 Hz using the Viewpoint video-eyetracker.
Peak velocity increased significantly with increasing ocular rigidity (F [2,263] = 30.635, P < 0.001). Time to peak velocity (F [2,263] = 27.723, P < 0.001) and total response time (F [2,263] = 21.133, P < 0.001) decreased significantly with increasing ocular rigidity. Ocular rigidity was significantly positively correlated with peak velocity (R 2 = 0.67, P < 0.001), and significantly negatively correlated with time to peak velocity (R 2 = 0.64, P < 0.001), and total response time (R 2 = 0.62, P < 0.001).
Original languageEnglish
Pages (from-to)1251-1258
Number of pages8
JournalInvestigative Ophthalmology and Visual Science
Volume55
Issue number3
DOIs
Publication statusPublished - Mar 2014

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Saccades
Reaction Time
Manometry
Eye Movements
Informed Consent
Healthy Volunteers

Keywords

  • ocular rigidity, axial length, saccadic eye movements, peak velocity

Cite this

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abstract = "The aim of this study was to determine whether variation in ocular rigidity (a quantity that describes the elastic properties of the globe) affects the characteristics of horizontal saccadic eye movements. Thirty-three young, visually healthy subjects participated with informed consent in the study. Axial length was measured using the IOLMaster ocular biometer. Ocular rigidity coefficients were determined using Schiotz tonometry. Horizontal saccades were stimulated randomly to 40° in 10° steps. Eye movements were recorded continuously at a sampling rate of 60 Hz using the Viewpoint video-eyetracker.Peak velocity increased significantly with increasing ocular rigidity (F [2,263] = 30.635, P < 0.001). Time to peak velocity (F [2,263] = 27.723, P < 0.001) and total response time (F [2,263] = 21.133, P < 0.001) decreased significantly with increasing ocular rigidity. Ocular rigidity was significantly positively correlated with peak velocity (R 2 = 0.67, P < 0.001), and significantly negatively correlated with time to peak velocity (R 2 = 0.64, P < 0.001), and total response time (R 2 = 0.62, P < 0.001).",
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The effect of ocular rigidity upon the characteristics of saccadic eye movements. / Alhazmi, Mohammed; Seidel, Dirk; Gray, Lyle.

In: Investigative Ophthalmology and Visual Science, Vol. 55, No. 3, 03.2014, p. 1251-1258.

Research output: Contribution to journalArticle

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