What did he need that extra eye for? I have had no useful forward
vision in my left eye for 70 years that I know of (I got specs at age
2). Except for a bit of extra caution with noting where the wingtips
are, the spare eye serves no useful purpose while flying.

Since this man is just a casual aquaintance, I can only relay what
he said. However, I suspect that the cost of maintaining an airplane
had something to do with it.

I have run across a few one-eyed pilots, and have noticed that they
seem to do as well as "normal" ones. I'm in the latter category, but
don't trust my depth perception when it comes to wingtips. An easy
way to assure clearance (assuming the sun is shining) is to watch
the shadows on the ground (works best with high wing A/C). :-)

David Johnson