在形容一个人因年老而美貌、青春不在时,人们常会用上“人老珠黄”一词。不过,这个词的本意却是指人一老,眼珠就会渐渐变得浑浊。是否人老都会变得“珠黄”?一般情况下,确实是这样的,随着年龄的增长,眼睛的功能逐渐衰退,结膜透明度降低,且变薄变弱,并出现老年性色素沉着,因而眼睛看起来会不再那么黑白分明。 In describing a person due to old age and beauty, youth is not, people often use the word “people old beads yellow”. However, the original intention of the word refers to the old man, his eyes will gradually become muddy. Does it usually become “beads yellow?” Under normal circumstances, it is true, with age, the gradual decline of the function of the eyes, conjunctival transparency is reduced, and thinning weakened, and senile pigmentation , So the eyes will not look so black and white.