Do you have any idea of where he went during that time? I would be amazed if my cat "got lost" and then returned back 6 months later.
No idea whatsoever, he was quite skinny when we found him. I can only think that he was living rough in our area; my other half found him in a wood yard at the end of our street. Most likely the injury to his eye disorientated him, though the vet seemed to think it could only have happened within the last 2-3 weeks before we found him.
The time he went missing was around bonfire night/diwali - lots of fireworks freak 'em out. It's my guess he was outside and got frightened by the loud noises then got too far away to find his way back properly, either that or he got bashed up by the local siamese (kato) who used to fight anything with more than 2 legs.
We put up lots of posters when he first went missing. Tbh it was pretty gutting to loose him. Once he'd been gone for more than a week I'd resigned myself to the idea that he'd gone, and by the time he'd been missing for over a month I had assumed the worst had happened.
Prodigal son indeed. The cheeky little git