一款多焦点镜片带有矫正老视的设计。
A multifocal lens designed for the correction of presbyopia.
这种可调节的焦点使得宇航员能够执行诸如在一段时间内在昏暗光线下阅读小字清单的任务，然后用相同规格的一对镜片监测日常开销读数。
That adjustable focus allows astronauts to perform tasks like reading small-print checklists in low-light conditions on minute, then monitoring overhead readouts the next using the same pair of specs.
既然有研究显示那些对自己更有控制感的人往往是乐观的人，为什么不去控制你“心理镜片”的焦点呢？
Since research shows that those who feel they have a better sense of control tend to be the most optimistic, why not take charge of where your psychological lens is focused?
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