Awareness of UV and color discrimination ability according to the frequency of the use of sunglasses in two groups differing in iris color

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  • 虹彩色の異なる2群間における紫外線に対する意識とサングラスの使用頻度別色の弁別能力
  • コウサイショク ノ コトナル 2グンカン ニ オケル シガイセン ニ タイスル イシキ ト サングラス ノ シヨウ ヒンドベツ イロ ノ ベンベツ ノウリョク

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Abstract

Noting polymorphism of iris color, we performed a survey of the status of the awareness ofUVandanti-UVmeass in daily life in 2 groups differing in iris color (brown and blue-green). In addition, color discrimination ability was measured using the 100 hue test under an illumination of 500 or 30 lx, and the results of the test were evaluated according to the frequency of the use of sunglasses. The following results were obtained. As anti-UV measures, the brown his group mainly used parasols and hats, while the blue-green iris group used sunglasses and hats. The purpose of their use was protection against sunburn in the brown iris group and the protection of the eyes in the blue-green his group. Thus, differences were observed in anti-UV measures and awareness between the two groups. Concerning color discrimination ability according to the frequency of the use of sunglasses, in the brown iris group, the total deviation score was slightly higher in individuals not using sunglasses than in those sometimes or frequently using them under 500 as well as 30 lx In the blue-green his group, the total deviation score under 500 lx was significantly higher in individuals not using sunglasses than in those sometimes or frequently using them, showing a poorer color discrimination ability in individuals not using sunglasses. These results suggest the influences of UV in individuals inthe blue-iris group not using sunglasses.

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