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KMID : 1011420150200040491
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Journal of Korean Ophthalmic Optics Society
2015 Volume.20 No. 4 p.491 ~ p.499
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Effect of Visual Perception by Vision Therapy for Improvement of Visual Function
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Lee Seung-Wook
Lee Hyun-Mee
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Abstract
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Purpose: This study was to examine how decline of visual function affects visual perception by assessing visual perception after improving visual function through visual training, and observing the change in the cognitive ability of visual perception.
Methods: This study analyzes the visual perceptual evaluation (TVPS_R) of 23 children below age 13(8.75±1.66) who have visual abnormalities, and improves visual function after conducting vision training (vision therapy) of the children.
Results: Convergence increased from average 3.39±2.52 ? (prism) to 13.87±6.04 ? in the measurement of long-distance disparate points, and from average 5.48±3.42 ? to 18.43±7.58 ? in the measurement of short-distance disparate points. Short-distance diplopia points increased from 25.87±7.33 cm to 7.48±2.87 cm, and as for accommodative insufficiency, short-distance blur points increased from 19.57±7.16 cm to 7.09±1.88 cm. In the visual perceptual evaluation performed before and after improving visual function, 6 items except visual memory showed statistically significant improvement. By order of significant improvement, response gap was highest with 17.74±16.94(p=0.000) in visual closure, followed by 15.65±17.11(p=0.000) in visual sequential-memory, 13.65±16.63(p=0.001) in visual figure-ground, 12.74±18.41(p=0.003) in visual form-constancy, 6.48±10.07 (p=0.005) in visual discrimination, and 4.17±9.33(p=0.043) in visual spatial-relationship. In the visual perception quotient that added up these scores, the response gap was 15.22±8.66(p=0.000), showing a more significant result.
Conclusions: Vision training enables efficient visual processing and improves visual perceptual ability. It was confirmed that improvement of visual function through visual training not only improves abnormal visual function but also affects visual perception of children such as learning, perception and recognition.
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KEYWORD
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Vision, Visual Function, Visual Dysfunction, Visual perception, Vision Therapy
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