Vergence Eye Movements are Triggered By

Question

Vergence eye movements are triggered by
A) Seeing eye to eye with another person
B) Retinal disparity and detection of blurriness
C) Retinal disparity but not detection of blurriness
D) Detection of blurriness but not retinal disparity

Accepted Answer

Vergence eye movements are triggered by the different images captured by each eye due to retinal disparity (difference in the position of an object on the retina of each eye) as well as detection of blurriness. The brain uses these differences to create a single, three-dimensional image.