我从来没有明显的花眼，从来没戴过老花镜。
但最近近距离视力突然变得格外好，穿针一两秒钟一次成功，比过去快得多（大概需要十秒左右）。字极小的说明书也可以看得非常清楚。
网上一查吓一跳，说老年人近距离视力变好常常是白内障前兆。
英文AI：
While cataracts generally cause a gradual decline in vision, it's true that some types of cataracts can temporarily improve near vision, leading to the perception of better eyesight, especially for reading. This "second sight" phenomenon is often associated with nuclear cataracts, which can initially improve focusing on close-up objects. However, this improvement is usually short-lived as the cataract progresses and affects other areas of vision, causing overall blurriness and other symptoms.
