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For the majority of infants, eye color becomes permanent between 6 and 9 months of age. By this point, the iris has stored enough pigment to determine the final shade. But for some children, subtle changes can continue for much longer. Data suggests that while the drastic changes happen in the first year, the final, true eye color is typically established by age 3.
read more about eye color permanent age in babies ...Eye color depends on melanin, the same pigment that colors skin and hair. Babies are often born with blue or gray eyes because melanin production requires light. Inside the womb, it is dark, so the melanocytes (pigment cells) are not fully active. Once the baby is born and exposed to light, these cells start producing melanin. As the pigment builds up over time, the eyes may darken from blue to green, hazel, or brown.
Not all babies change color. Data shows that ethnicity plays a huge role. Most non-Caucasian babies are born with brown eyes, and they typically stay brown, perhaps deepening slightly. In contrast, studies on Caucasian infants show that a significant percentage are born with blue or gray eyes. Of these, roughly 10% to 15% will experience a shift to a darker color as they grow.
Biologically, the change is a one-way street. Eyes can get darker, but they almost never get lighter. This is because the process involves adding pigment to the iris. It is physically impossible for the body to remove pigment from the iris structure once it is there. Therefore, if a baby is born with brown eyes, they will remain brown for life.
While age 3 is the standard cutoff, rare cases exist where eye color changes later in childhood. Medical data indicates that a small fraction of children may see their eye color shift until age 6. Even rarer, some changes can occur during puberty due to hormonal surges, although this is the exception rather than the rule.
You can make a guess, but it is not 100% accurate. Genetics is complex. Even if both parents have brown eyes, they might carry the recessive genes for blue eyes, giving them a 25% chance of having a blue-eyed baby.
This is usually due to the scattering of light. Since baby eyes often have low pigment, they reflect the colors of the room or the clothing they are wearing, making them appear to shift between gray, blue, and green.
Sometimes. Congenital heterochromia (two different colored eyes) can be seen at birth, but it often becomes more obvious as the melanin fills in during the first few months of life.
If you notice that one eye is changing color while the other stays the same, or if the eye looks cloudy instead of clear, see a pediatrician or eye doctor. This could be a sign of a congenital cataract or a rare condition. Also, if a baby's eyes jiggle back and forth (nystagmus), this warrants an immediate exam.