arcus senilis halo vision

例句：

1. 1.The elderly couple enjoys a leisurely walk in the park every Sunday.
   这对老年夫妇每个周日都喜欢在公园里悠闲地散步。
2. 2.As an elder in the community, she often offers advice to the younger members.
   作为社区中的长者，她经常向年轻成员提供建议。
3. 3. The elderly are often overlooked in discussions about healthcare policy.
   在讨论医疗保健政策时，老年人常常被忽视。