From about the age of 45 or so initially, the lens gradually hardening, decreased flexibility, ciliary body function has been weakened, and onset of presbyopia.

大约从45岁左右初步，晶状体逐渐硬化、弹性下降，睫状体的功用也在减弱，然后出现老花眼。

youdao

Senile cataract is the most common form, is the lens caused by aging and hardening muddy, often occur in the elderly, the so-called old "-" yellow.

老年性白内障为最常见的一种，乃水晶体老化而变硬混浊所致，常发生于老年人，所谓人老“珠”黄。

youdao