Babies' eyes appear shiny due to a combination of factors related to their developing eyes and the way light interacts with them. One factor relates to melanin production.
Melanin and Eye Color at Birth
During fetal development, babies spend nine months in a dark environment. According to research, melanocytes in the eyes do not produce melanin until after birth because of this darkness. The bright lights encountered after birth trigger melanin production. The amount of melanocytes is genetically determined.
Factors Contributing to Shine:
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Developing Cornea and Lens: The cornea and lens of a baby's eye are still developing. The clear and smooth surfaces of these structures reflect light more efficiently than a fully developed eye might.
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Increased Light Reflection: The developing structures, including the lens, might contribute to a reflection of light inside the eye, creating a noticeable shine.
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Low Melanin Levels: Initially, babies have low levels of melanin in their eyes, which can make their eyes appear brighter and more reflective. As melanin production increases, their eye color darkens, potentially reducing the perceived shine.
