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。
2
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.