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KMID : 1011420120170030279
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Journal of Korean Ophthalmic Optics Society
2012 Volume.17 No. 3 p.279 ~ p.284
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Measurement of Amplitude of Accommodation using Push-up and Push-away and Near Point of Convergence in Elementary School Children
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Kim Hyo-Jin
Lee Eun-Hee
Oh Hyun-Jin
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Abstract
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Purpose: We measured the amplitude of accommodation using the push-up and push-away tests and near point of convergence (NPC) and investigated the accommodative insufficiency (AI) and convergence insufficiency (CI) in elementary school children of 12~13 years old.
Methods: 88 students who aged 12~13 (12.63±0.51) years old with more than 1.0 spectacle best corrected visual acuity were examined using push-up and push-away tests. The break and recovery points of NPC also were measured.
Results: Mean amplitudes of accommodations using push-up and push-away tests were 11.52±2.59 D and 10.06±1.97 D, respectively in right eye (P<0.001). Mean break and recovery points in NPC were 8.66±1.99 cm and 10.98±2.06 cm. AI and CI showed 28.75% and 30.00% each. 48.75% was within normal range in both amplitudes of accommodations according to their age expected and convergence. Students having both AI and CI were 7.50%.
Conclusions: A high correlation between the push-up test and push-away test was found in elementary school children (r=0.6025; P<0.05). Students having normal amplitude of accommodation by their age expected and normal convergence were 71.25% and 70.00%, respectively.
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KEYWORD
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Accommodative insufficiency, Convergence insufficiency, Near point of convergence, Push-up test, Push-away test
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