Types of eye movement
| Type of eye movement | Brief description |
|---|---|
| Vestibular | Slow, conjugate, movements designed to compensate for head movements, thereby keeping eyes on target |
| Optokinetic | Slow, conjugate, movements designed to use large field visual information to stabilise eyes, thereby assisting vestibular system which tends to fatigue after a few seconds |
| Saccadic | Fast, conjugate, movements: |
| – occur spontaneously to a variable extent | |
| – reset position of eyes in orbits during vestibular and optokinetic movements | |
| – move foveae onto new target of interest | |
| Smooth pursuit | Slow, conjugate, movements designed to keep foveae directed at moving target |
| Vergence | Slow, horizontally disconjugate movements designed to allow both foveae to be directed to a target of interest, whatever its distance from the observer |