I actually noticed that I had one eye bigger than the other too.....
Was it caused by the AN?
Well I believe probably yes and no....
Had the AN grown so big that my eye was buldging NO!
So this event happened about 18 months before diagnosis of AN.
I woke up one night with one sore eye. I had scratched my eyeball on my pillow, my eye was stuck open and I found it very hard to close it. It looked like my eyeball was very swollen and buldging. I immediately went to the hospital. Within a few hours it looked mostly normal again, and I could close my eye again. I had a CT scan they found nothing and they put it down to an alergic reaction of some sort. I have since realised my eye hadn't buldged at all, it was just that my eyelid was stuck open and gave the impression of a buldgey eye.
What I have noticed since then.
My eyelids seem to naturally be more open on one side compared to the other, this gives the impression of a buldging eye.
Is this slight weakness in my eyelid caused by the AN? Quite possibly.
So it could be the tumour is pressing hard on the facial nerve.
My AN eye blinks slightly slower than my good eye, and my lower lid droops slightly.
As you maybe aware some people with AN's complain about their eyesight, words jumping around, seeing double etc.
This is attributed to a compromised balance nerve and a loss or partial loss of the Vestibular Occular Reflex
So to overcome this loss, and to stop words jumping around, I had unconsciously started to read with one eye.
My wife commented on it, my eyesight was great when tested... but I had all of a sudden started using one eye.
I now favour my AN eye.. 10 years ago I didnt. One eye does look slightly bigger than the other, while photos of me 10 years ago dont show this. The other explanation for my slightly buldgey eye could be the way I favour that eye now.
Anyway that was my observation, I hope that helps... Maybe you have a slight eyelid weakness, and/or favour one eye like I do.
As for your AN growing... dont panic
You are less than 12 months in and swelling is completely normal.
It may continue to swell for 2 years sometimes longer before it stabilises or begins to shrink.