Something you can look into is vetericyn eye gel, first time I ever had the stuff was for my dogs eye infection that the vet suggested I try. It says its safe for use in all animals eyes.
I ended up hatching out a chick with deformed eyes last summer and was dealing with crusty eyes, one eye was sealed shut at first from build up of crust and the other eye was mostly sealed shut from the same thing (but due to the deformity he could not fully close his eye on the beak side of the eye)
I started treating it with vetericyn and saline, then got some terramycin and was using that, my vet suggested since it was a baby chick not use too much of the terramycin, but said I can continue using the vetericyn and saline to keep his eyes moist as he grows to see if he grew out of this. (He didn't but he was able to close his really bad eye just enough to keep it moist when he got old enough to go outside).
I found mine at a farm store, which is where you most likely will find it, just try and find a more big box farm store as they are most likely to have it. I found it in the dog section but I think you can also find it in cat sections and maybe even livestock sections. I figure it might be worth asking your vet about and seeing if its something worth trying.