as ridiculous as this sounds lazy eye or not, me seeing the picture of him without sunglasses just bothers me, i'm as curious as you all are, but i dunno i feel like i want to say "ah well, it's over! let's pack our shit up people!" but obviously that isn't the case i've stumbled on the uneven ground and now want to tread deeper down the hole, a friend who follows jace as well just refuses to see the picture claiming "No, Jace's sunglasses are his eyes." and now that magic is gone, now moving on to actually contribute to this thread i think he's got a lazy eye and that's it maybe i'm wrong, maybe he does have a bloodshot/milky eye from something but i just think it's a little lazy the picture shows us nothing, i literally don't see anything wrong with his eye, it was a quick two second(maybe less) flash on a crappy webcam in the dark, let's not all jump the gun just yet
tl;dr his right eye(his right) probably doesn't have much wrong with it, except that it's lazy maybe it is missing but let's go by what we know jace loses it when it's called lazy, i'm sure someone will say it's missing at some point and we'll see how he reacts but the evidence just points to it being a little lazy maybe he's even a little cross-eyed