Blind dog??

[ncmailman]

I needed to ring the hog's nose, went & got my Walker dog(8 years old).When the hog went 1 way sometimes he would run the other way looking for the hog.He might be barking & looking in the wrong direction.It seems like he might see some up pretty close but I can't tell. Finally caught the hog, but both eyes seem to look fully dialated all the time. Also noticed his eyes shine green in the daylight.Does anybody have any experience with anything like this? Do you think he is blind??