A 3-week-old baby can see best at a very close range of about 8 to 12 inches (20 to 30 centimeters), which is roughly the distance between the baby's face and a caregiver's face during feeding or holding. Beyond this distance, their vision is mostly blurry because newborns are nearsighted at this stage

. At three weeks, babies may begin to recognize familiar faces and can focus on objects within that close range. Their eyes are still developing, and they may occasionally cross or drift outward, which is normal until their eye muscles strengthen

. Color vision is just starting to develop, but they mainly see high-contrast patterns and shapes rather than a full spectrum of colors

. In summary, a 3-week-old infant's clear vision is limited to about 8 to 12 inches, and objects or faces beyond that distance appear blurry to them. Their vision will improve significantly over the next few months as their eye muscles and visual processing mature