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The Effect of Cranial Osteopathic Treatment on Visual Function

Journal: The Journal of the American Osteopathic Association Date: 2007/08, 107(8):Pages: 331. doi: Subito , type of study: randomized controlled trial

Full text    (https://www.degruyter.com/document/doi/10.7556/jaoa.2007.107.8.327/html)

Keywords:

cranio-sacral osteopathy [223]
randomized controlled trial [889]
vision [17]

Abstract:

Objective: The effects of cranial osteopathy on visual function, particularly on changes of the visual field, and the binocular alignment of the eyes, are limited in the literature. Anecdotal evidence indicates that patients who undergo cranial osteopathic manipulation claim to experience an improvement in visual performance. A pilot study recently conducted by the authors demonstrated that a single treatment using cranial osteopathic manipulation produced statistically significant differences (p<0.05) within groups for multiple optometric parameters. In the present full study three important issues were addressed and included in the design of this study: increasing sample size, measuring the cumulative effects of multiple treatments, and measuring the temporal permanence of these effects. Methods: Using a randomized, double-blind, placebo-controlled protocol, we assessed for a change in visual function following cranial manipulation among a sample of healthy adults with cranial asymmetry. 113 adults (18-35 years old), who were free of active ocular or systemic disease, were consented prior to and entered into the study. The Nova Southeastern University's institutional review board approved the study. Following a battery of optometric examinations, all participants were evaluated for cranial dysfunction. The treatment group received cranial osteopathic manipulation to correct cranial dysfunctions, while the control group had a light pressure of a few ounces of force applied to their cranium without the use of osteopathic manipulation. All subjects were re-evaluated for cranial dysfunction after the intervention, and then all optometric parameters were re-measured. This was repeated for a total of 8 visits, followed by another 8 visits during which only the optometric measurements were performed. Results: 89 subjects completed the trial, 42 in the control group and 47 in the treatment group. A two-way ANOVA revealed statistically significant differences within groups in seven of the twelve parameters measured, and between groups in Pupillary size measured under bright illumination OS (p<0.05) and Near Point of Convergence break measurement (p<0.04). Conclusion: The changes in both groups suggest that active motion testing of the sphenobasilar synchondrosis (SBS) may alter the cranial system to a sufficient extent as to alter visual function.


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