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.
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。
They claim it can dramatically reduce the need for reading glasses in those who already wear them, as well as put off the day on which others need to invest in a pair.
他们声称，它可以显著地降低已经戴眼镜的人们对眼镜的依赖，同时也能推迟其他需要戴眼镜人购买眼镜的时间。
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