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.
Each caddie has a different arrangement with his golfer, and some are paid only a percentage of the winnings with no base salary. Caddies on the PGA Tour who work 30 weeks a year will usually make at least $50,000 annually. That figure goes up depending on how successful the caddieâs golfer is during the year. Caddies for top golfers can easily make six figures or more annually.