Effects of a Two-Diopter Prism on Posture
Author Information
Author(s): Marini Davide, Rubegni Giovanni, Sarti Lorenzo, Rufa Alessandra, Mandalà Marco, Ferretti Fabio, Tosi Gian Marco, Fruschelli Mario, Yoon Kyung Chul
Primary Institution: University of Siena
Hypothesis
This study aims to evaluate whether ocular misalignment and prismatic correction of horizontal phoria affect posture.
Conclusion
A two-diopter prism on the non-dominant eye slightly improves postural control by encouraging the use of the ankle joint, while not significantly altering the center of gravity oscillations.
Supporting Evidence
- The prism significantly increased the composite movement strategy score.
- Postural stability was maintained with the prism, indicating a selective effect on balance control.
- Participants were unaware of the prism use during the tests to avoid bias.
- Baseline posturographic parameters were statistically independent of individual phoria.
- Secondary analysis showed significant differences in posturographic scores across different sensory organization test conditions.
Takeaway
Wearing a special lens can help people stand better by making them use their ankles more when balancing.
Methodology
Sixty-nine young healthy subjects were divided into three groups based on their horizontal distance phoria and assessed using dynamic computerized posturography with and without a two-diopter prism.
Potential Biases
Self-selection bias may limit the generalizability of the results as all participants were healthy volunteers and medical students.
Limitations
The study population consisted exclusively of young adults, limiting generalizability to other age groups, and only short-term effects of the prism were assessed.
Participant Demographics
Young healthy adults aged between 18 and 35 years.
Statistical Information
P-Value
p = 0.004
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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