What does the term "eye band" describe?

The term "eye band" specifically describes the color around the eye of certain rabbit breeds. This feature is often a distinguishing characteristic that contributes to the overall appearance of the rabbit. Some breeds may have a specific color pattern or variation surrounding their eyes that enhances their visual display and can be important for breed standards in competitions and shows.

In contrast, the other choices refer to different aspects of a rabbit's features or conditions. The pattern of fur on a rabbit's head relates to its coat design rather than the specific coloration around the eye. The iridescence of a rabbit's eyes speaks to a reflective quality that may not be related specifically to the eye band. Finally, a condition of the rabbit's eyesight would pertain to health issues, not the aesthetic appearance defined by the term "eye band." Thus, the correct choice is that it refers to the color surrounding the eyes of specific rabbit breeds.