Regards to point one this in no way suggests this boy has been neglected by his current carer.The damage was done while he was living out.
I think it's more than likely he was a stray, he was in such a mess bless him and covered in ticks
Regards to packing the eye, I would say the other surgery I use is old fashioned, Sean did his first eye op there which was on Morris and every eye op he does, he puts packing in.
This little guy is fine anyway, Sean said the op went well but he's an older cat and he said ideally one his teeth wants removing but because of everything he's been through today, he didn't want to leave him open to infection so the tooth will probably have to be done at a later date.