Measurement of Fixational Eye Movements With the Head-Mounted Perimeter Imo

AI Generated Summary*

Fixational eye movements were tracked in 18 healthy adults (mean age 40.4) during perimetry with a head-mounted device sampling at 300 Hz, which tests one eye while both fixate. Bivariate contour ellipse area (BCEA) and horizontal and vertical microsaccade rates were compared across five 200 msec windows around each stimulus. Binocular viewing gave a smaller BCEA (P<0.01) and lower vertical microsaccade rate (P<0.05); horizontal rates did not differ significantly. BCEA and horizontal microsaccades peaked 400 to 600 msec after onset; movement was estimated to roughly double the retina stimulated by a Goldmann III target. Direction showed no significant link to test location. Binocular testing is proposed to steady fixation, though the sample was small.

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