Blanks for ophthalmic lenses; blanks for use in the manufacture of lenses; eyeglass lenses; eyeglasses having ground lenses; lens blanks for use in ophthalmic lenses; lens blanks for use in optical lenses; lenses for eyeglasses; lenses for glasses; lenses for spectacles; optical lenses; optical lenses for use with spectacles; plastic lenses; spectacle lenses; optical glasses