Third, you need to do eye exercises.

第三，你需要做眼保健操。

How often do you do eye exercises?

你多久做一次眼保健操？

It's good to do eye exercises.

做眼保健操是有好处的。

Secondly, do eye exercises often.

其次，经常做眼保健操。

We do eye exercises twice a day.

我们每天做两次眼保健操。