I found tis on the web.
http://qzone.qq.com/blog/13069389-1229934500孔子眼是在手掌大拇指关节处，如果有两道弧形纹线上下两端对称连在一起，呈橄榄形或眼睛形状，从祖上传下话说，有此“孔子眼”者必定是“文曲星”下凡，再不济的亦是能舞文弄墨文采斐然的才子佳人。
I saw the so-called 孔子眼 on my niece thumb. hers is unique in the sense that the " vein" on her wrist form the " pupil" on her thumb. i am very bad at describing. It really look like an eye on the thumb , with the lines form the shape of the eye and vein forming the pupil of the eye. Is there any special meaning to tat? It looks very unique.
