Spinal branches, pass into the vertebral canal via the intervertebral foramina and contribute to supply not only of the vertebral bodies and extradural content of the canal, but also of the dura and spinal cord, reinforcing the anterior and posterior spinal arteries.
Your baby will be able to see pretty clearly by the time he's 12 months old, but his vision won't be fully developed until he's between 3 and 5 years old. A baby's vision improves dramatically over the first year. At birth an infant can detect light and motion, then can make out faces and large shapes. By the end of the first month, a baby can make eye contact and focus on objects about 12 inches away. By the time a baby is 3 to 4 months old, he can distinguish between colors and focus on smaller objects.
Conveniently, this is about the distance between a mother and baby's face during feeding, making it a great time for getting to know each other. As for the age-old question of how colorful a newborn's world is, we now know that babies can see color right from the start if the color is very bright. Is My Baby's Vision Normal? A great test of vision is just having some up-close and personal time with your baby, who by 4 to 6 weeks of age should be gazing intently into your eyes and mimicking your facial expressions.