They should open their eyes in about 2 to 3 weeks.
Around two weeks of age
Just around 9 days of age.
In 1-2 weeks
About 10 days, don't be concerned if one eye opens first on any of them.
It usually depends on how much you handle them.my cat just had kittens 3 days ago and I handle them a lot.the one I hold most has one eye open slightly....but I could be wrong its just from experience
They Open & 7-10 Days. My Cat Just Had 5 Kittens On June 5 , 2010 And Today One Of The Little Fat Cats I Think Is The Oldest Has 1 Eye Opened And It's Blue It Will Change Just Be Patient