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Yesterday, only ET had the exclusive on the condition of ANNA NICOLE SMITH's baby girl and why she's wearing an eyepatch. Daddy LARRY BIRKHEAD explained that little DANNIELYNN has strabismus, a medical condition commonly known as being "cross-eyed."

"It's nothing new to me, but it's new to the public because she's been going out more, and people may take pictures and people speculate that something's wrong with her," Larry tells ET's MARK STEINES, "but she's actually healthy and happy, just except for a little problem with one of her eyes, but it's going to be okay."

"Really, to me, it's a personal [issue] -- it wasn't something that I really wanted to talk about," says Larry, "but there's so much misinformation about it, and I don't really want people to say that she's not being treated, or looked after, or a healthy happy baby, because she is, and it's obvious by looking at her. She's either met or exceeded all of her developmental milestones and [the doctors] were all really impressed … she's ahead of schedule."

And Larry staunchly defends any suggestion in the tabloids and on Web blogs that Dannielynn's condition has anything to do with methadone or any medications Anna may have taken during her pregnancy.

"All of the opinions that I had [from doctors], every one of them said that it's very, very unlikely, because no one knows 100 percent what causes [strabismus]," says Larry. "But I point-blank ask every single doctor, 'Could any medications that Anna was on have caused this?' and they said that it's more likely that a genetic reason could have caused it."