Nystagmus is the medical term to describe involuntary eye movements. The eyes may move vertically, horizontally, in circles, or erratically in different directions. Nystagmus affects about 1 in every ...

In 2017, Karen Porter mentioned something unusual at a routine neurology appointment: Everything she saw appeared to be vibrating. The 57-year-old U.K. resident has chronic migraines, and over the ...