Photo courtesy of CodyR on Flickr.
All of the young pilots had been selected for their perfect eyesight, but even more important was how broadly they could see, how wide a horizon they commanded, and how quickly they could focus in on the faintest off-center visual cue. They competed to locate stars in daylight. Sakai wrote:
Gradually, and with much more practice, we became quite adept at our star-hunting. Then we went further. When we had sighted and fixed the position of a particular star, we jerked our eyes away ninety degrees, and snapped back again to see if we could locate the star immediately. Of such things are fighter pilots made.
I personally cannot too highly commend this particular activity, inane as it may seem to those unfamiliar with the split-second, life-or-death movements of aerial warfare. I know that during my 200 air engagements with enemy planes, except for two minor errors I was never caught in a surprise attack.
— Mark Bowden. “The Last Ace”. The Atlantic, 2009.
Or you can read more from Saburo Sakai in his 1957 book, Samurai!, about being a Japanese fighter pilot during WWII.
