A Science Enthusiast Staff

Cats' eyes are not always the expected green or yellow; newborns have big blue eyes.

Reddit user u/Illustriousesque posted:

“All kittens have blue eyes when they're born (because blue eyes have little to no melanin and their bodies don't produce it). The color starts changing to green or yellow at around 4 weeks, when more melanin is being produced, and the process ends at 10 weeks”

Newborn kittens do not produce enough melanin to give the green or yellow coloring to their eyes.

  • User u/handfullofham commented that this is also true for humans, only that our eyes typically change to brown or hazel instead of green or yellow.
  • A series of commenters acknowledge how their eyes turned darker around puberty.

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