Some have the rim black, some distinctly blue, some greyish-blue, some greenish; and this last colour is the sign of an excellent disposition, and is particularly well adapted for sharpness of vision.

• 一些边缘黑色，一些是明显的蓝，一些是灰蓝色，一些是绿色的；最后这种颜色是一种良好部署的象征，并且特别适合于视觉锐度。