There are two types of photoreceptors, the cones and the rods. The cones function in bright light and there are three types that are maximally sensitive to different colours, which allows the ratio of their responses to code colour.
Medioimages/Photodisc/Photodisc/Getty Images. Most PGA Tour caddies make a salary of between $1,000 and $1,500 a week, plus a percentage of the playerâs winnings each week. A common rate is 5 percent for finishes outside the top 10, 7 percent for non-winning top-10 finishes and 10 percent if the golfer wins.
Based on some widely held beliefs â a pro caddy makes about $1,000-1,500 per week as a base salary (whether their player makes the cut or not). When their player makes the cut â the caddyâs income breaks down as follows: 1  5% of winnings for a finish outside the top 10.  7% of winnings for a finish inside the top 10.