Nystagmus means: This is when one can see very fast, and essentially twitch their eyes side-to-side. This is a genetic mutation. Asking someone to explain it is similar asking them how they move their fingers. This mutation can cause severe vision problems and may lead to a loss of sight. (in Community Dictionary, added by Billingsgate)

What else does Nystagmus mean?

  • Involuntary, rapid eye-jiggling. Eye-wobbles are the real name of what you get when you take ecstacy. (in Community Dictionary, added by Balduino Vázquez)
  • An involuntary and rapid oscillatory movement of the eyeball. (in AZ Dictionary)