I can well believe that. Where students totally lose the plot, we quite often get them to hit tee'd up 8-irons with their eyes closed.
But here's a fact that very few people know: Nobody can see impact, not even Tiger!
The club approaches the ball at 60mph even at a slow swing, if you're a stonger swinger it could be 100mph. The downswing takes roughly 1/3rd of a second, hip to hip takes about 1/15th of a second and impact itself is no more than 1/50th of a second.
Nobody can see an object travelling at that speed for that short space of time.
That's what makes golf difficult because the player has to anticipate impact.