Eye movement and Saccade

Eye movement noun - The movement of the eyes.

Saccade and eye movement are semantically related. In some cases you can replace term "Saccade" with "Eye movement", this terms are similar.

Saccade noun - A rapid, jerky movement of the eyes between positions of rest.

Eye movement and saccade are semantically related. You can use "Eye movement" instead a noun "Saccade".