I'm not a vet or even a chicken expert - I've only had chickens for 7 weeks now, but I had one chick that I thought didn't have an eye when we got it. (Looked to be about the same age as yours, give or take.) When I realized she DID have an eye and barely opened it (it looked similar to yours, but was super duper crusted over), I started cleaning with a cotton swab with saline solution 2-3 times a day, and applying neosporin when I finished cleaning it. I applied the neosporin to the cotton swab, then rubbed it on the outside of the closed eye. I didn't want to force the eye open or anything. Her eye healed up, but I think she either can't see out of the eye, or can't see well. She favors the other eye, but gets around just fine - walking, jumping up on roosts (though sometimes she falls off the low ones). She keeps it closed a lot of the time, but does have it open sometimes too. 
She ended up being our sweetest hen! (Again, please note this is just what I did, having basically no experience with chickens. I don't know if what I did was the right way or not, but it worked for us.)
Good luck!
(Here's a few photos of my sweet gal, One Eye Willie.
)
She ended up being our sweetest hen! (Again, please note this is just what I did, having basically no experience with chickens. I don't know if what I did was the right way or not, but it worked for us.)Good luck!
(Here's a few photos of my sweet gal, One Eye Willie.
