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。
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.
晶状体核硬化混浊还受环境、饮食及代谢等多种因素影响。
The nuclear sclerosis and opacities are also associated with environment, diet, metabolism and many other factors.
晶状体核硬化是白内障的表现之一，晶状体核在眼内受多种因素的影响发生硬化混浊。
The lens nuclear sclerosis is one of cataract manifestations. The nucleus of crystalline lens may become sclerosis and opacities under influences of numerous factors in eyes.
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