Panic causes tunnel vision. Calm acceptance of danger allows us to more easily assess the situation and see the options.

In the kingdom of the blind, having tunnel vision might get you somewhere.......

I tend to have a kind of tunnel vision when I'm looking at an individual piece.

I was single-minded and I had tunnel vision. Now it's time for a change.

When your child is sick, you have tunnel vision.

Research has shown that time pressure leads to tunnel vision and that people think more creatively when they are calm, unhurried and free from stress and distractions. We all know this from experience.