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.
The Association of Professional Tour Caddies put an offer on the table before the lawsuit was filed: $10,000 per year for health care and $10,000 per year for retirement, for an estimated 200 caddies. That comes out to $4 million annually for the caddies, out of an annual revenue of nearly $1 billion.