Final answer:
Children generally achieve full adult vision by late adolescence or early adulthood, as their perceptual development continues through these stages. Significant improvements in color and depth perception start in infancy, but the maturation process of vision extends into early adulthood.
Step-by-step explanation:
Perceptual Development and Full Adult Vision
Perceptual development refers to the gradual advancement of the ability to interpret sensory information. In newborns, vision is not fully developed, which is evident in their limited color perception and lack of depth perception. Initially, most newborns can distinguish red but have difficulty with other colors. However, color perception improves rapidly after birth. Depth perception starts to develop as the infant becomes mobile and continues to progress throughout early childhood.
By around six months, an infant's vision has improved significantly, nearing the acuteness of adult vision. They begin to notice colors and develop the skill to discriminate depth. Nonetheless, the progression of these visual capacities does not conclude at six months, as vision, like other cognitive abilities, continues to mature through adolescence and into early adulthood.
Research indicates that myopia, or nearsightedness, often starts in school-age children and generally progresses until the early twenties. Adolescents around fifteen exhibit cognitive abilities comparable to adults, which includes enhanced perception derived from experience.
Therefore, when discussing when children have full adult vision, it generally occurs during late adolescence or early adulthood, as by this stage, both the structure of the eye and cognitive processing of visual information have developed to an adult level.