I have a female super pastel ball python which my son named Curly. I have had her for about 6 months but today just noticed that her eyes are not all one color. There is a dark strip through the center of each eyeball that lines up with the eye stripes on her scales. The upper portion of her eyes is a green with yellow tint, the lower portion seems more yellow with green tint. Anyone know if this type of eye coloration is common, uncommon or rare?