Different eye colors have different meanings and personality traits behind them. For example, brown eyes are extremely trustworthy while green eyes are passionate. The amount of melanin your eyes have can also have ties to future medical problems like cancer. The lighter your eyes are the more at risk you are of developing these medical problems, so it's imperative that you take the necessary precautions like wearing UV protective sunglasses. If you notice certain changes in your eyes, like reddening or yellowing of the whites of your eyes, it can signal certain health issues like allergies or jaundice.