这是因为大多数的阅读设备都可以增大字体字号从而适应自己的需要，从而方便了那些视力不好人。
That is because with most devices you can enlarge the font size to as large as you like, which will help people with failing eyesight.
定期眼科检查可以让眼科保健专家帮助你矫正或适应视力改变，同时也能早期发现其他眼科问题。
Regular eye exams give your eye care specialist a chance to help you correct or adapt to vision changes, as well as detect eye problems at the earliest stage.
另外，实验还显示，碳酸钙眼睛允许石鳖在水中和空气中达到相同的视力，这可能有助于它们适应潮汐变化。
For another thing, the experiments suggest aragonite allows the chitons to see equally well in air or underwater, something that's probably useful as tides ebb around the mollusks.
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