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Citation |
O'Connor AR, Birch EE, Anderson SK, Draper H. Invest. Ophthalmol. Vis. Sci. 2010; 51(4): 2019-2023. |
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Affiliation |
Directorate of Orthoptics and Vision Science, University of Liverpool, Liverpool, United Kingdom. |
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Copyright |
(Copyright © 2010, Association for Research in Vision and Ophthalmology) |
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DOI |
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PMID |
19933184 |
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Abstract |
Purpose. Development or restoration of binocular vision is one of the key aims of strabismus management; however, the functional impact of stereoacuity has largely been neglected. Methods. Subjects aged 10-30 years with normal, reduced or nil stereoacuity performed three tasks: Purdue pegboard (measured how many pegs placed in 30 seconds), bead threading task (with two sizes of bead to increase the difficulty, time taken to thread a number of beads was measured) and a water pouring task (measured both accuracy and time). All tests were undertaken both with and without occlusion of one eye. Results. 143 subjects were recruited, 32.9% (n=47) with a manifest deviation. Performance on the pegboard and bead tasks was significantly worse in the nil stereoacuity group when compared to those with normal stereoacuity. On the large and small bead tasks those with reduced stereoacuity were better than those with nil stereoacuity (when using the Preschool Randot Stereoacuity Test results to determine stereoacuity levels). Comparison of the short term monocular conditions (those with normal stereoacuity but occluded) to the nil stereoacuity group showed that in all measures the performance was best in the nil stereoacuity group and was statistically significant for the large and small beads task irrespective of which test result was used to define stereoacuity levels. Conclusion. Performance on motor skills tasks was related to stereoacuity, subjects with normal stereoacuity performing best on all tests. This quantifiable degradation in performance on some motor skill tasks supports the need to implement management strategies to maximise development of high grade stereoacuity. Language: en |