Kittens usually open their eyes within 1 to 2 weeks after birth, which is a fairly normal timeframe, but the specific time depends on the breed and individual differences.

In general, kittens should start opening their eyes around 8 days after birth. However, it may take about 14-15 days for them to fully open their eyes. But some kittens may open their eyes earlier or later. If a pet owner finds that a kitten has not opened its eyes after 14 days, they should take it to a veterinary hospital for examination and treatment as soon as possible to avoid any adverse effects on the kitten.