Evaluating fluid-filled glasses for motion sickness symptom mitigation in a computer-assisted rehabilitation environment (CAREN).

Only 29 participants were analysed, and the authors state the study was underpowered to detect small effects from the glasses. One participant was excluded because CAREN did not produce adequate symptoms. Participants had to stand independently and had no neurologic, surgical, musculoskeletal, visual, or vestibular balance conditions, so the results may not apply to patients with those problems. The motion sickness was induced by a CAREN scrambler simulation, not by cars, boats, planes, or everyday therapy settings. The study did not provide the stationary object recommended by the glasses manufacturer, so it did not exactly match the manufacturer's use. The paper does not report the randomisation method or blinding details, which limits how much weight can be placed on the group comparison. No dedicated anxiety questionnaire was used, even though anxiety can affect motion sickness reports. Sex differences were not analysed because the sample was too small.

No funding or conflict-of-interest declaration appears in the supplied text. The study used Hion glasses and tested the manufacturer's claim, but the paper does not state whether Hion supplied, funded, or influenced the work.

Do not conclude that fluid-filled glasses are ineffective for all motion sickness. This small CAREN pilot tested a particular brand in a simulated ride, and the authors state it was underpowered to detect small effects.