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http://dx.doi.org/10.14479/jkoos.2014.19.3.371

Effect of Artificially Decreased Visual Acuity upon Eye-Hand Coordination using Lee-Ryan Eye-Hand Coordination Test  

Lee, Ki-Seok (School of Optometry and Vision Science, University of New South Wales)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.19, no.3, 2014 , pp. 371-376 More about this Journal
Abstract
Purpose: The aim of this study was to explore the effect of artificially decreased eye in normal vision on eye-hand coordination (EHC) when using the Lee-Ryan Eye-Hand Coordination Test recently reported. Methods: Eleven adults with normal vision aged $29.46{\pm}5.94$ years participated for this study where a non-dominant eye artificially induced moderate refractive amblyopic vision at near by adding a plus lens conducted EHC tasks and then did the test again under normal vision following 2 weeks. To investigate the ability of EHC, 7 tasks including individually different level of difficulty in the Lee-Ryan EHC Test were selected to compare and analyze EHC in terms of two independent variables such as time taken and the number of errors. Results: In time taken, subjects with artificially decreased vision took more time than normal vision under monocular conditions (p=0.013), while those with the decreased vision completed their tasks faster than normal vision under binocular conditions (p=0.001). In the number of errors, subjects with the decreased vision made more mistakes (p<0.001) as shown in time taken, whereas there was no difference between monocular and binocular viewing conditions in the decreased vision. Conclusions: Unlike previous EHC tests including limitations for application, deficit in EHC can be screened by the Lee-Ryan EHC Test developed based on simple computer-based system. Therefore, it is considered that further studies relevant to deficits in visual function such as amblyopia will be carried out in clinics as well as research.
Keywords
Lee-Ryan Eye-Hand Coordination Test; Artificially decreased vision; Eye-hand coordination;
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