Long time no see. 
Frankie has a gunky eye. He doesn’t seem to be in any pain – he is eating, peeing, binkying around as normal. We’ve finally cracked getting close to him, and I’ve touched it, wiped it, swabbed it, and he has no issue whatsoever, he just lets me get on with it. I’m going to take him to the vet, that’s not an issue. I’d just like some feedback about how much of an emergency it is, as I don’t think I can take him til Friday without a big fuss. here is a picture.

Has anyone seen this before? As you can see, his eye isn’t swollen, nor is it visibly dribbling. Major gets gunk in his eye on a regular basis which he grooms out, but Frankie has a wet patch the size of his cheek and it’s not really drying out.
Any ideas? Thanks!
EDIT: I don’t like taking pictures with the flash, but I couldn’t get a picture without it. I was almost a metre away and this is blown up. I don’t usually take pictures with flash. :S