Cosmic rays that hit the optic nerve create this effect.

宇宙射线撞击视觉神经会产生这种效果。

It ripped the optic nerves off my left eye and there was catastrophic compression damage to the right eye.

它撕裂了我左眼的视神经，对右眼造成了灾难性的压迫损伤。

The rising pressure within the eye damages and eventually kills the optic nerve.

眼内升高的压力会损害并最终杀死视神经。

So we took older mice, and damaged their  optic nerve just by pinching at the back.

所以我们拿了年长的老鼠，通过捏背部来损伤它们的视神经。