What term describes the observation of eye movements of both eyes working together?

The term that describes the observation of eye movements of both eyes working together is known as versions. This concept refers to the coordinated movement of the eyes in the same direction, which is critical for maintaining single binocular vision. During versions, both eyes move together, whether it is looking to the right, left, up, or down. This coordinated motion helps ensure that both eyes are focused on the same point, allowing for better depth perception and a unified visual experience.

In contrast, ductions refer to the movement of one eye independently, which does not capture the collaborative aspect of eye movement. Convergence specifically pertains to the inward movement of both eyes when focusing on a near object, emphasizing a particular type of coordinated motion rather than general eye movements. Fixation involves maintaining the gaze on a single point but does not inherently describe the movement aspect of both eyes working together. By understanding these distinctions, it becomes clear why versions is the term used to denote the synchronized movement of both eyes.