TelevEyes was a complementary product to the ComputerEyes family. While the latter captured images from video into the computer, TelevEyes converted the computer's display to a standard video signal that was displayable on a TV screen or recordable on a VCR.
The outputs of the early computers (Apple II, Commodore, Atari) were already standard video signals — you could use a regular TV or video monitor to display them. No TelevEyes required! But newer computers had special higher resolution displays, and their outputs weren't standard video. So if you wanted to record it on a VCR or display it on a big-screen TV, you needed TelevEyes.
The TelevEyes name was another play on words (albeit not as good as the original ComputerEyes pun). Televise ... TelevEyes ... get it?
Several models of TelevEyes were developed over the years: