What term describes rapid, jerky side-to-side eye movements?

The term that describes rapid, jerky side-to-side eye movements is strabismus. Strabismus is a condition where the eyes do not properly align with each other when looking at an object, which can include issues such as involuntary movements that create those rapid, jerky motions. These movements can sometimes occur as a result of coordination issues with the muscles that control eye movement.

The other terms do not pertain to these specific eye movements. Corectasia, while it may sound related, refers to a condition involving the cornea, and keratocele relates to a deformity of the cornea itself. Thus, strabismus is the most accurate description of the described eye movements.