On Thursday, Matilda and I went to see the paedeatric opthamologist about her crossed eyes. We were there for ages, as he had to dilate her pupils to get a good look in them (had to wait for 30 mins for the drops to take effect). He had some pretty nifty kids toys/instruments (like an Elmo shaped tool for shining a light into her eyes to look at them) and was very kind. After examining her, the Doctor has diagnosed Matilda with infantile esotropia (aka congenital esotropia, squint or both eyes turning in to the middle). He's recommended surgery to correct how her muscles are working, and to do the surgery before she turns 2. We have another checkup in about 6 weeks time to see if M is preferring one eye over the other. We've always thought her left eye turns in more than her right, but the Doctor didn't notice any preferences in the session on Thursday. If she is showing a preference for one eye, then she'll have to do some patching before surgery.
Gory details on the surgery: it is under general, but is only day surgery. M won't be able to swim for 6 weeks after the surgery, so we wouldn't have it in the middle of summer! Both eyes are operated on in the same surgery. On average, children with this condition have 2.6 surgeries to correct it, so there's a potential for M to have 3, maybe more, surgeries to correct this. There are some experimental treatments involving botox, but to have that you're already pretty much having half an operation anyway. M's eyes will look really gross afterwards, very very red, beyond bloodshot.
From my research on the web, the big concern if this isn't corrected is that M won't develop binocular vision correctly and her eyes won't work together. Not only does this have an impact on her vision, but also would have an impact on her brain development. We're not particularly keen on M having surgery (what parent is??), and are waiting for the next appointment before anything is seriously planned. Our friend, Dr Fred the paedeatric surgeon has assuaged my fears that operations and general anaesthetic for a little one are much less risky than driving around in the car.