Here's a breakdown of their vision development:
* Birth: Kittens are born blind.
* 1-2 weeks: They begin to open their eyes and start to see light and shadows.
* 2-3 weeks: Their vision becomes clearer and they can start to see objects.
* 4-6 weeks: Their vision is mostly developed, though it continues to refine until they are about 8 weeks old.
It's important to note that this is a general timeframe, and some kittens might develop their vision slightly earlier or later. If you're concerned about your kitten's vision development, consult with a veterinarian.