Could well be pinkeye, often starts with a poke due to grass/hay/silage.
The cloudiness is inflammation in the cornea, the surface of the eye, and may be a sign of ongoing infection, or a sign of healing, it can be hard to tell until time reveals whether or not it is getting better!
Antibiotic ointment is good (eg. Orbenin) but I would suggest also giving a shot of long acting terramycin injection and probably a shot of anti-inflammatory (eg. Metacam) would be useful too.
Hope she feels better soon!