HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Weir, C. R. Articles by Dutton, G. N. Search for Related Content PubMed PubMed Citation Articles by Weir, C. R. Articles by Dutton, G. N.

Spatial Localization in Esotropia: Does Extraretinal Eye Position Information Change?

¹ From the Tennent Institute of Ophthalmology and ² Department of Orthoptics, Gartnavel General Hospital, Glasgow; and the ³ Department of Vision Sciences, Glasgow Caledonian University, United Kingdom.

PURPOSE. To investigate the accuracy of spatial localization in children with a specific type of convergent strabismus, fully accommodative esotropia.

METHODS. Two groups of children, with right and left fully accommodative esotropia, respectively, pointed at targets located centrally and eccentrically on a computer touchscreen without being able to see their hands. The size and the direction of the horizontal pointing responses were recorded under two conditions: when their eyes were aligned (wearing spectacles) and when they were squinting (not wearing spectacles). A group of children without strabismus but with hypermetropia were assessed as controls.

RESULTS. For both fully accommodative groups, the pointing responses to the central target shifted in the direction of the nonsquinting eye when deviations were manifest. No difference was found for the eccentric targets. No difference was found for the hypermetropia group with any target.

CONCLUSIONS. These results are consistent with an alteration in the extraretinal eye position information (efference copy, extraocular muscle proprioception, or both) that is used in spatial localization.

This article has been cited by other articles:

				C. R. Weir, M. Cleary, S. Parks, T. Barrie, H. M. Hammer, and J. Murdoch Spatial Localization after Different Types of Retinal Detachment Surgery Invest. Ophthalmol. Vis. Sci., June 1, 2001; 42(7): 1495 - 1498. [Abstract] [Full Text]