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KMID : 1011420140190030371
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 3 p.371 ~ p.376
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Effect of Artificially Decreased Visual Acuity upon Eye-Hand Coordination using Lee-Ryan Eye-Hand Coordination Test
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Lee Ki-Seok
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Abstract
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Purpose: The aim of this study was to explore the effect of artificially decreased eye in normal vision on eyehand
coordination (EHC) when using the Lee-Ryan Eye-Hand Coordination Test recently reported.
Methods: Eleven adults with normal vision aged 29.46±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.
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KEYWORD
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Lee-Ryan Eye-Hand Coordination Test, Artificially decreased vision, Eye-hand coordination
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