膚色、髮色及瞳孔顏色均是由黑素細胞(Melanocyte)所產生的黑色素(Melanin)而定。495Please respect copyright.ＰＥＮＡＮＡExFZUEoppG
然而，負責膚色髮色與負責瞳孔顏色的黑素細胞卻有著一道顯著不同的分別。495Please respect copyright.ＰＥＮＡＮＡRR9JZATNsu
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（圖2）黑素細胞所產生的黑色素，會儲存在名為黑色粒子的細胞器官裡頭。495Please respect copyright.ＰＥＮＡＮＡlQ8V6yE37i
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位於皮膚下的黑素細胞，會釋出黑色粒子到髮囊及皮膚細胞，賦予皮髮顏色。495Please respect copyright.ＰＥＮＡＮＡLpzSBXVxKa
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而位於虹膜(Iris)的黑素細胞，則不會釋出黑色粒子到細胞外部，而是把它儲存在細胞內。495Please respect copyright.ＰＥＮＡＮＡO8Qxbzh8Pl
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（圖3）當光線進入眼睛的虹膜，內部蛋白質所折射及吸收的波長便會呈現出瞳孔的顏色。495Please respect copyright.ＰＥＮＡＮＡs2UqoUJN45
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瞳孔之所以呈藍色，並不是有著藍色素的物質，而是純粹因為虹膜內的黑色素稀少，最終折射出藍色波長的光線。495Please respect copyright.ＰＥＮＡＮＡbHYIRUJHNi
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虹膜越多黑色素的話，瞳色便會越漸啡黑。495Please respect copyright.ＰＥＮＡＮＡXsI45n6KoN
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而患有白化病(Albino)的人士，基於缺乏黑色素，光線折射出眼睛內血管的顏色，因而呈粉紅色狀。495Please respect copyright.ＰＥＮＡＮＡBnXeXyZ0ph
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延伸閱讀:495Please respect copyright.ＰＥＮＡＮＡLhCbNqNeXA
深入淺出–以中性pH7的方式染髮495Please respect copyright.ＰＥＮＡＮＡG5gSJE5OHa
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。495Please respect copyright.ＰＥＮＡＮＡQj2xKN6x06
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。495Please respect copyright.ＰＥＮＡＮＡnjKubGlIck
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。495Please respect copyright.ＰＥＮＡＮＡUAq19Ik0Pq
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Ref1:https://www.sciencedirect.com/science/article/pii/S0168952504001593?via%3Dihub#TBX1
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