Duffy is an Irish Terrier who lost his vision because of diabetes. He went from a happy and normal dog to completely blind within a few months and had problems adjusting.
Duffy ran into things, couldn’t recognize his humans, and when his diabetes became stable enough for surgery, the family decided to take the chance. Luckily, the surgeons succeeded, and the family filmed being reunited with him. The video has gone viral and has 4,5 million views this far.