Any good anagrams for time viewer?

In science fiction, a time viewer, temporal viewer, or chronoscope is a device that allows another point in time to be observed. The concept has appeared since the late 1800s, constituting a significant yet relatively obscure subgenre of time travel fiction. One reason authors may choose to write about time viewers rather than time machines is to circumvent the issue of temporal paradoxes. Most commonly only the past can be observed, though occasionally time viewers capable of showing the future appear; these devices are sometimes limited in terms of what information about the future can be obtained. Other variations on the concept include being able to listen to the past but not view it. Recurring applications include studying history, solving crimes, and entertainment. Because the past includes events as recently as the previous second, privacy may be compromised by such devices; several stories explore the implications thereof. Other stories examine the effects of being observed by onlookers further into the future. An unanticipated influence on past events is a common motif in stories about time viewers, and exploiting this side-effect appears in some stories.

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