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要約 目的:少年野球選手の視機能の報告。対象と方法:野球塾に通う8~15歳の29人を対象とした。男子27人,女子2人で,有意な平均年齢は13.2歳である。競技中の状態で,静止視力,動体視力,屈折,眼位,眼球運動,輻湊を測定した。結果:全員が眼位は正位で,眼球運動と輻湊は正常であった。静止視力は58眼中52眼(90%)が1.0以上で,両眼視力は29人中28人(97%)が1.0以上であった。動体視力については視力1.0以上の者では単眼で37.9%であり,0.6と0.8が多かった。両眼では20.7%であり,0.9が多かった。静止視力と動体視力との間には有意な相関があった。静止視力と動体視力は,いずれも年齢と相関しなかった。静止視力は球面度数と相関があり,動体視力と屈折との相関はなかった。結論:少年野球選手のほとんどに屈折異常があるが,多くは矯正されたよい視力で競技をしている。静止視力と動体視力との間には有意な相関がある。
Abstract. Purpose:To report the visual function of junior baseball players. Cases and Method:This study was made on 29 baseball players aged from 8 to 15 years. The series comprised 27 boys and 2 girls. The age averaged 13.2 years. They were tested for static and kinetic visual acuity, refraction, eye position and movement, and convergence. Results:All were orthophoric. All showed normal eye movement and convergence. Static visual acuity was 1.0 or over in 52 out of 58 eyes(90%)and was 1.0 or over in 28 out of 29 cases(97%)when seen with both eyes. Kinetic visual acuity was 1.0 or over in 37.9% of eyes mono-ocularly and 20.7% binocularly. Static and kinetic visual acuity was significantly correlated and was not related to the age. Refraction was correlated with static visual acuity and not with kinetic one. Conclusion:Anomaly in refraction is present in the majority of junior baseball players. A correlation is present between static and kinetic visual acuity.
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