Development and Gender Differences in Dynamic and Kinetic Visual Acuities in Children from 8 to 17 Years of Age

Kohmura, Yoshimitsu; Yoshigi, Hiroshi; Sakuraba, Keishoku; Aoki, Kazuhiro; Totsuka, Ryoko

doi:10.5432/ijshs.ijshs20080314

Cited by 7 publications

(5 citation statements)

References 15 publications

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“…Contrast sensitivity is ability to distinguish between dark and light. Contrast sensitivity was measured using a Sine Wave Contrast Test (Stereo Optical Co., Inc., Chicago, IL, USA) (Kohmura et al, 2008; Furuta et al, 2009), and contrast sensitivity was measured at each spatial frequency of 1.5, 3, 6, 12, and 18 cycles/degree. Each of the circles in the cart contains lines.…”

Section: Methodsmentioning

confidence: 99%

“…Dynamic visual acuity was measured using a dynamic visual acuity test apparatus (HI-10, Kowa Co., Ltd., Aichi, Japan) (Kohmura et al, 2008). In this test, the subject attempted to determine the direction of the gap in a Landolt ring moving from left to right on a semi-circular screen.…”

Section: Methodsmentioning

confidence: 99%

“…Depth perception was measured using a depth perception test apparatus (AS-7JS1, Kowa Co., Ltd.) (Kohmura et al, 2008; Furuta et al, 2009). The apparatus contained three bars, and the central bar moved back and forth at a speed of 50 mm/s.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Yellow-Tinted Lenses on Visual Attributes Related to Sports Activities

Kohmura

Murakami

Aoki

2013

Journal of Human Kinetics

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The purpose of this study was to clarify the effect of colored lenses on visual attributes related to sports activities. The subjects were 24 students (11 females, 13 males; average age 21.0 ±1.2 years) attending a sports university. Lenses of 5 colors were used: colorless, light yellow, dark yellow, light gray, and dark gray. For each lens, measurements were performed in a fixed order: contrast sensitivity, dynamic visual acuity, depth perception, hand-eye coordination and visual acuity and low-contrast visual acuity. The conditions for the measurements of visual acuity and low-contrast visual acuity were in the order of Evening, Evening+Glare, Day, and Day+Glare. There were no significant differences among lenses in dynamic visual acuity and depth perception. For hand-eye coordination, time was significantly shorter with colorless than dark gray lenses. Contrast sensitivity was significantly higher with colorless, light yellow, and light gray lenses than with dark yellow and dark gray lenses. The low-contrast visual acuity test in the Day+Glare condition showed no significant difference among the lenses. In the Evening condition, low-contrast visual acuity was significantly higher with colorless and light yellow lenses than with dark gray lenses, and in the Evening+Glare condition, low-contrast visual acuity was significantly higher with colorless lenses than with the other colors except light yellow. Under early evening conditions and during sports activities, light yellow lenses do not appear to have an adverse effect on visual attributes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effect of Yellow-Tinted Lenses on Visual Attributes Related to Sports Activities

Kohmura

Murakami

Aoki

2013

Journal of Human Kinetics

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“…KVA was not improved by either training although some effects on visual function were observed 21) . A subsequent study with junior high school students also revealed that training did not improve KVA 22) .…”

Section: Factors Associated With Kvamentioning

confidence: 93%

“…Kohmura et al studied 867 men and women aged 8-17 years and reported that DVA developed gradually with age, but KVA did not change from age 8 to 17 years 23) . Therefore, KVA is expected to reach almost the same level as adults by the age of 8 years 23) .…”

Section: Factors Associated With Kvamentioning

confidence: 99%

Sports and Kinetic Visual Acuity

Sawaki

Kohmura

Aoki

et al. 2022

Juntendo Medical Journal

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Kinetic vision acuity (KVA) is an index developed in Japan that refers to the capacity to recognize a moving object that moves back and forth against the observer. This review outlines the history of KVA and studies on KVA conducted at the Faculty of Health and Sports Science of Juntendo University, i.e. characteristics of KVA in athletes, factors associated with KVA, sports and age-dependent decline of KVA, and effects of docosahexaenoic acid (DHA) and astaxanthin on KVA. KVA was defined in the early 1960s, and the measurement device was invented in 1968. Studies at the Faculty of Health and Sports Science began in the 1990s. In track-and-field athletics and skeleton, a winter downhill event, higher-ranked athletes had higher KVA than lower-ranked athletes. Although KVA cannot be predicted from static visual acuity or reaction time, a significant correlation was found between KVA and the peak latency of visual-evoked potentials. KVA could not be improved by training and did not change between age of 8 and 17 years. In contrast, habitual practice in kendo may inhibit the age-dependent decline in KVA. DHA may also improve KVA in subjects with low KVA; however, astaxanthin did not improve KVA.

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