Color discrimination ability of elderly women with sunglasses

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  • サングラス装着時における高齢女性の色彩弁別能力
  • サングラス ソウチャクジ ニ オケル コウレイ ジョセイ ノ シキサイ ベンベツ ノウリョク

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Abstract

Wearing sunglasses with a UV-cut function is recommended to protect the eyes from ultraviolet rays. To investigate color perception through lenses with different-colored tints, this study examined elderly women by employing a 100-hue test to assess their color discrimination ability. The illumination on the working plane was about 5,000lx, and the lens colors of the sunglasses used were smoke, brown, and blue. In a comparison regarding the total deviation score among the those who did not wear sunglass and three colored lens groups, a significant difference was observed between no sunglass and brown lens groups, with a lower color discrimination ability identified in the latter. In a comparison regarding the mean deviation score for each of the 100 hues, significant differences were noted in 11 of the 100 hues between no sunglass and blue lens groups, and 10 of the 100 hues between no sunglass and brown lens groups. It was demonstrated that hues in the green yellow (GY), blue (B), and purple blue (PB) to purple (P) spectra were more difficult to discriminate with blue lens glasses, while hues in the red (R), yellow red (YR), green (G), blue green (BG), and red purple (RP) spectra were more difficult to discriminate with brown lens glasses.

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