When viewing tasks on the task listing, on a milestone, or via the home page calendar you may have noticed an eyeball icon appears some times.
The eyeball icon is a notification that someone else has worked on the task and you are yet to see the work. The task may have had a recent comment or a recent document uploaded to it that you haven’t seen. As soon as you’ve viewed the tasks the icon will clear.
The same functionality is available by viewing tasks in the recently updated tasks section. The eyeball icon is a subtle notification that something has occurred with the task that you may not be aware of.