One eye smaller than the other?? 👁

So I’ve been noticing with my daughter her left eye is bigger than the other. I know faces aren’t symmetrical but hers are noticeably different sizes. When she was first born she wouldn’t open that right eye for a week. The doctor have checked her eyes and said they are fine. I’m not sure if it’s because she didn’t use the muscles like her other eye so it just needs time to even out. I read about ptosis but she doesn’t have a squint at all so I’m not sure.Can anyone ease my mind or know what it is?