Thank you for the long and supportive answers !
It is a genetic cataract yes and what happened is that after we returned it to the shop and wanted to get it back she was gone. We turned over the whole country to find her again and after 2 days efford it appeared that a fammily just took her. We took a new dog but the person from which the familly took her is informed that if they see the problem and return her ( which i suppose they will do ) To call us imidiately to take her back along with the other westie we have now. I hope that family wont do so she wont have to pass the stress of beeing moved but if they do return her im taking her.
Cheers on people who watch dogs like this

Means that you are rly loving person who can give for what he loves
Thanks again and Best wishes