Was he, in fact, totally losing touch with the world around him?

Though far at sea, he had not lost contact with the world on shore.

We are at risk of losing touch with the outside world.

It was a sense of losing touch with the world.

Thus there was no danger of losing contact with the outside world.

Even the mayor nearly lost contact with the outside world.

In fact, I'd go further and argue that we've actually lost touch with the world.

Most of the knowledge was lost with the old world.

After having lost contact with the outside world for years, he was "found" there on November 10, 1871.

After years of being a news hound, she lost touch with the world.