I can't make out the pictures clear enough.
However, if an animal has had orf then it should be immune and not get it again. If the scabs are dry and causing no problem then it's most likely not orf. Some sheep get scabs on their face when grazing near thistles. It gets mistaken for orf but isn't, and never turns into the horrible bleeding, painful, highly infectious scabby growths of true orf, which once seen are never again mistaken.
As for pink eye, or any eye infection - I find best treatment is Orbenin. It's a long acting antibiotic for eyes, so only needs one application (normally) and is obtainable from the vet. To administer - pull the lower eyelid down and apply to that. DO NOT try to apply straight to the eyeball or you run the risk of poking the animal in the eye when it struggles.
Zwartbles - possibly yours is orf, as you say that one is really bad. Could have come from your rented ram.
An easy treatment is mix sulphur powder (or flowers of sulphur broken up) with a roughly equal quantity of salt and let the sheep help themselves. It doesn't work immediately, but it always does work, and you'll suddenly find in about a week that the scabs are drying up and going.