I have a issue with something called dry eye, ( lack of tear production) in my jack Russel and have to buy a crem made up by the vet, £25 a month, It’s the dogs left eye the one with the brown patch
it does look cloudy, but doesn’t affect him, apparently caused by an infection, I use viscotears as well, his other eye is clear, he’s a good grafter, and as I said yet to see it slow him down,