求翻译：由于人眼中晶状体弹性的下降，不能对眼前近距离目标进行清晰聚焦而无法进行阅读或工作的一种生理现象，医学上称为老视，即俗称的老花眼。人眼具有一种既能看远也能看近的能力，我们称之为调节力，是通过用增加或减少晶状体屈光力来实现的。但是，随着年龄的增长，晶状体逐渐地变坚实和硬化，失去了可塑性，因而调节力渐渐减小。这种调节力量的消失并不是病理变化，因为它在人的一生中缓慢进行着，并不是突然发生的。随着年龄的增加，调节力量逐渐减低，在做近距离工作时感到困难，最终出现老视眼。是什么意思？

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In the eyes of people because of the flexible lens, decline in the immediate proximity goals could not be a clear focus and cannot be read or working in a physiological phenomenon, medically known as old as, commonly known as presbyopia. Those who have eyes but also a way to look too far for regulat

Because the human eye lens elastic declined, not to clear the close range goal focus, are not going to read or work in a physiological phenomenon, medically known as presbyopia, presbyopia that commonly known as. Human eyes have a both have far can also look at near capacity, which we call regulatio