I would say it is bigger problem with the hips than eyes.
I tend to agree with this statement.
Vary rarely now, do you see a Cocker fail it's eye test, but quite often high hipscores crop up in the breed record supplement. Remember that very few breeders hip score their breeding stock, so the problem is likely to be worse than it appears.
I have heard SOME breeders of particolours saying when I mentioned that I was getting my dog (who is used at stud) scored that it is unecessary in particolours as it is not a problem associated with those colours, but how do they know if they are not scoring ??
Similarly Luxating Patellas are becoming a major problem, but this is another condition that gets swept under the carpet.
With breeders on the dog's & the bitch's side saying they do not know where it comes from.