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KMID : 1011420170220040427
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Journal of Korean Ophthalmic Optics Society
2017 Volume.22 No. 4 p.427 ~ p.433
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Characteristics of Dynamic and Kinetic Visual Acuity in Young Myopic Eyes
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Kim Young-Cheong
Park Sang-Woo
Shim Hyun-Suk
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Abstract
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Purpose: To investigate the characteristics of dynamic visual acuity (DVA) and kinetic visual acuity (KVA) in young myopic eyes and to investigate the clinical or ocular factors affecting DVA and KVA.
Methods: Eighty subjects aged between 20-32 years old were recruited. Before measuring the DVA and KVA, visual acuity, spherical equivalent refractive error, intraocular pressure were measured, and axial length, central corneal thickness, anterior chamber depth, lens thickness, pupil diameter were obtained by optical low coherence reflectometry (Haag-Streit, Koniz, Switzerland) and central subfield thickness, cube volume, cube average thickness parameters of macular were measured using a Cirrus high-definition optical coherence tomography (HD-OCT) device (Carl Zeiss Meditec, Dublin, CA, USA). Monocular and binocular DVA were measured using a dynamic visual acuity analyzer (designed by Jangill Moon, Hyunsuk Shim, and Youngcheong Kim). Monocular and binocular KVA were measured using a kinetic visual acuity meter AS-4A (KOWA, Tokyo, Japan). All measurements were repeated at baseline, 1 week, and 4 weeks.
Results: In comparison between monocular and binocular viewing, binocular DVA was higher than monocular DVA. However, there was no difference in KVA. Men showed higher DVA and KVA than women at baseline, 1 week, and 4 weeks. The lower degree of myopia, shorter axial length, and longer pupil diameter were the higher DVA. Similarly, the lower degree of myopia and shorter axial length were the higher KVA. However, KVA did not show association with pupil diameter.
Conclusions: DVA and KVA may be different by sex, degree of myopia, axial length, pupil diameter. Clinical factors and ocular biometry should be considered when measuring DVA and KVA.
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KEYWORD
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DVA, Dynamic visual acuity, KVA, Kinetic visual acuity, Clinical factor, Myopia, Ocular biometry, Pupil diameter, Axial length
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