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Re-alignment of the eyes, with prisms and with eye surgery, affects postural stability differently in children with strabismus

  • Neuro-ophthalmology
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Abstract

Aim

The purpose of the study was to examine the effect of eye re-alignment (after wearing prisms and after eye surgery) on postural stability in children with strabismus.

Methods

Nine children with strabismus (6–13 years old) participated in the study. A posturography platform (TechnoConcept) was used to examine posture in quiet stance at two distances: steady fixation of a target at near distance (40 cm) and at far distance (200 cm). Four different conditions were tested: with and without prisms before eye surgery, and twice after eye surgery.

Results

The surface of the CoP increased after wearing prisms (540 mm2 compared to the condition without prisms (462 mm2); in contrast, eye surgery reduced the surface of the CoP, leading to improved postural control (454 mm2 and 401 mm2, respectively, in the post 1 and post 2 surgery condition). Unlike normal children, strabismic children showed no improvement in postural control at near distance.

Conclusions

Binocular visual and motor changes affect body sway; adaptive mechanisms induced by eye re-alignment after surgery allow improved postural control. The absence of dependency on distance in postural stability in strabismic children could be due to their impaired depth perception and to the poor integrity of the visual signal required to control posture.

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Acknowledgements

The authors thank the children who participated in the study, Florence Groffal for managing the children’s appointments, and Zofia Laubitz for correcting our English.

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Authors and Affiliations

  1. Laboratoire de Psychologie et Neuropsychologie Cognitives, FRE 3292 CNRS IUPDP Université Paris Descartes, 71 Avenue Edouard Vaillant, 92774, Boulogne Billancourt Cedex, France

    Agathe Legrand & Maria Pia Bucci

  2. Service d’Ophtalmologie, Hôpital Robert Debré, 48 Boulevard Sérurier, 75019, Paris, France

    Emmanuel Bui-Quoc

Authors
  1. Agathe Legrand
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  2. Emmanuel Bui-Quoc
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  3. Maria Pia Bucci
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Correspondence to Maria Pia Bucci.

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Legrand, A., Bui-Quoc, E. & Bucci, M.P. Re-alignment of the eyes, with prisms and with eye surgery, affects postural stability differently in children with strabismus. Graefes Arch Clin Exp Ophthalmol 250, 849–855 (2012). https://doi.org/10.1007/s00417-011-1845-z

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  • DOI: https://doi.org/10.1007/s00417-011-1845-z

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