Just 2 1/2 yrs ago when I worked in the M/C shop, I was the go-to guy when someone caught a splinter or metal shaving in the eye because my eyesight was the best in the shop(30 guys). Here we are now(I'm 45) and my eyesight has gone downhill rapidly...I blamed this mostly to increased computer useage, but I guess by the mid 40s, people seem to start noticing poorer vision.

Half of communication is listening. You can't listen with your mouth.