Infant estimulation cards are recommened up to 4 months of age.
joni2009,
It may be too late to show infant estimulation cards to your 8 month old baby, but you can start showing him some other type of cards like words and BIT (pictures). Which one you start with will depend on which method you want to follow.
ho,
Has you eye doctor recommended any kind of exercises for your baby's eye? I have the same problem and when I was a child I had to cover the "good eye" with an eye patch and go through the newspaper and with a pen fill up the o's
I'm not sure if they have come with new technics or if they have discovered if there is anything you can do about lazy eyes.