By what age can most infants demonstrate binocular vision?

Most infants can demonstrate binocular vision by around 4 months of age. Binocular vision refers to the ability to use both eyes together to perceive depth and three-dimensional space, which is crucial for tasks that require hand-eye coordination and depth perception.

At approximately 4 months, an infant's visual system has matured enough to allow for the alignment of both eyes, enabling them to focus on objects simultaneously. This developmental milestone is significant as it marks the beginning of the coordination of the visual and motor systems, which is essential for the infant to explore their environment more effectively.

By 6 months, most infants not only have established binocular vision but also exhibit more refined visual skills, such as depth perception and tracking moving objects. However, the foundational ability to demonstrate binocular vision is typically established by the end of the fourth month. As a result, while infants may be able to use both eyes for vision by 4 months, full development and refinement of depth perception and visual skills continue beyond this age, solidifying by about 6 months.