Many thanks for your reply Jacobus.
My reason for asking is that my White Ryland Ram suddenly appeared to be holding his head on one side about a week ago. I didn't pay much attention to start with and then realised he was staying like it. I caught him up and checked in and around his ears suspecting he had an ear infection, but all was perfectly clean and normal and cool. Upon further inspection I realised he couldn't see out of his left eye (the way his head was tipping). Apart from this and the fact he was stumbling very slightly when moving any faster than a walk, he appears perfectly normal. He seems to be able to graze without a problem and is still sniffing around his ewes.
Initially I suspected some sort of head trauma as the day before the problem started, we'd caught up the group of ewes and their ram in the adjoining field to do all their feet and worm drench etc, and there was some serious bashing of heads either side of the gate. Having said that, the Lleyn ram who weighs considerably more than the Ryeland, suffered a few minor cuts to the head, but the Ryeland didn't appear to have any marks at all.
I've left him out thinking that this may possibly be a temporary concussion type trauma to the temple, but today (as he's still the same) it suddenly occured to me that maybe the symptoms were of a Stroke type. Going on your description above and the fact your ram also went blind in one eye - I wonder if this is the problem.
If there is no change by the weekend, we'll catch him up and bring him back to the barn where we can shut him up and get a vet to take a look at him. I've left him out as he does seem to 'normal' apart from the symptoms described.... What do you think?
We even grow our own Brambles.