Table 1.

Overview of the testing paradigm.

Group 1: spectacles
Trial 1	VOR gain R	Trial 2	VOR gain R	= Recording session 1: testing without wearing spectacles
	VOR gain L		VOR gain L
Group 2: contact lenses
Trial 1	VOR gain R	Trial 2	VOR gain R	= Recording session 1: testing while wearing contact lenses
	VOR gain L		VOR gain L
Trial 3	VOR gain R	Trial 4	VOR gain R	= Recording session 2: testing without wearing contact lenses
	VOR gain L		VOR gain L
Group 3: control
Trial 1	VOR gain R	Trial 2	VOR gain R	= Recording session 1: binocular testing
	VOR gain L		VOR gain L
Trial 3	VOR gain R	Trial 4	VOR gain R	= Recording session 2: monocular testing
	VOR gain L		VOR gain L
Trial 5	VOR gain R	Trial 6	VOR gain R	= Recording session 3: binocular testing
	VOR gain L		VOR gain L

Group 1 (spectacles) underwent one recording session: without wearing their spectacles. Group 2 (contact lenses) underwent two recording sessions: with and without wearing their contact lenses. All recording sessions in Group 1 and 2 were performed monocularly (with the left eye covered). Group 3 (control group) underwent three recording sessions: the first and third recording sessions were performed binocularly (without eye coverage) and the second session was performed monocularly (left eye covered). One recording session consisted of two trials with at least 10 impulses to each side in total, tested under the same conditions.

VOR = vestibulo-ocular reflex, R = rightwards head impulse, L = leftwards head impulse.