The other creature said to have extraocular vision is a kind of sea urchin.

另一种具有眼外视觉的生物是海胆。

Myasthenia gravis preferentially affects young women or older men and commonly affects the extraocular muscles leading to eyelid drooping or double vision, but it might affect any skeletal muscle.

轻女性和老男性容易患重症无力，最常见的症状是眼外受复视或眼睑下垂，还会影响其他骨骼细胞。

Myasthenia gravis can affect the extraocular muscles, which control movement of the eye as well as the eyelids, so individuals might have diplopia or double vision, as well as ptosis, or drooping eyelids.

重症无力能影响眼外，而眼外控制着眼睛、眼睑的运动，所以患者可能会有复视以及眼睑下垂。