The Color-Sensitive Cones. In 1965 came experimental confirmation of a long expected result - there are three types of color-sensitive cones in the retina of the human eye, corresponding roughly to red, green, and blue sensitive detectors.
Most PGA Tour caddies make between $1000 and $1500 per week, but they also make a percentage of what the player wins in the tournaments. This usually equates to 5 percent of any finish outside the top 10. Players breaking into the top 10, but not winning, will share 7 percent of their prize with their caddies.
Caddies are traditionally paid 5% of the prize money for making a cut, 7% for finishing in the top 10, and 10% for winning a tournament according to Golf Digest's undercover pro.. If Spieth is using the same structure, his success on the golf course this season translates to a share of $866,534 for Greller. That would be enough for Greller to rank 93rd on the PGA Tour money list this season, ahead of 159 PGA Tour members.