Which of the following eye movements are considered conjugate eye movements?

• A. Microsaccades
• B. Microdrifts
• C. Microtremors
• D. Ocular tremor

Answer: (A)

Conjugate eye movements are movements where both eyes shift by the same amount in the same direction, so the gaze moves together and binocular alignment is preserved. Microsaccades are tiny, rapid kicks of the eyes that occur during fixation and function like miniature saccades; they move both eyes together in unison, making them a conjugate movement. The other options describe fixational movements that are not coordinated jumps of both eyes: microdrifts are slow, continuous drifts of gaze during fixation and don’t involve synchronized, jump-like repositioning; microtremors and ocular tremor are involuntary, high-frequency oscillations that can occur independently in each eye and aren’t characterized by the coordinated shift seen in conjugate movements.