It's always better to go to a specialist if there is one available vs. waste money on the regular Joe vet to tell you to go to the specialist; best to only spend the money on an exam once.
Sounds like Oakley might have a punctuate cataract or a corneal dystrophy plaque deposit. The size of a pencil point is not large enough, IMO, to cause the dog to be clumsy and/or not see well unless there is more going on which you can not see with the naked eye.
The sire's PPM should have no bearing on Oakleys eye issue unless it too is PPM - which I doubt. I would not be overly concerned until you see what the specialist has to say, there is nothing you can control at this moment, so why fret?
Good luck. Keep the group posted.