Yes, it is a problem if there are any sick or injured hogs. If you are worried you can always ring BHPS 01584 890801. They have details of hog carers/rehabilitators there are bound to be some who will still treat hogs. But it’s possible that he’s been like that for a long time. If you get a really good look you may be able to see whether the eyes are injured or infected. If you have a pair of binoculars, they are really useful for getting a closer up look without disturbing the hog. They aren’t always easy to catch. The little one here has been quite capable of showing a fast pair of heels when she wanted. Do you know, for sure that he’s a he?
It’s a good idea to put extra hog safety measures in the pond. But otherwise, just don’t move things around too much, especially in the feeding/watering areas, just to make it easier for the hog. Also try not to block any routes that the hog may have become familiar with. You probably don’t need to change too much because he will have got used to things as they are and too many changes might be confusing. But making sure everything is hog safe in the garden is good for all hogs.
I’m gusssing the hog is still visiting? No sign of the one here yet, but she did disappear very late so if she is hibernating is quite likely to be back late, too. Fingers crossed!