(来学网)眼科棱镜常用于矫正小角度斜视,顶角通常小于多少度?()
  • A.
    (来学网)20°
  • B.
    (来学网)15°
  • C.
    (来学网)10°
  • D.
    (来学网)40°
  • E.
    (来学网)30°