As any hardened drinkers know, too much alcohol can severely impair your sight.
But for one man in New Zealand, a whole bottle of whisky actually led to his eyesight being saved.
Denis Duthie suddenly went blind after vodka he had been drinking reacted with his diabetes medication.
The 65-year-old had decided to have a few drinks to celebrate his parents’ 50th wedding anniversary.
But when he walked into the bedroom of his home in Taranaki, New Zealand, he suddenly found that he could not see anything.
Speaking to The New Zealand Herald, he said: ‘I thought it had got dark and I’d missed out on a bit of time but it was only about half-past-three in the afternoon. I was fumbling around the bedroom for the light switch but … I’d just gone completely blind.’
He hoped he would be able to sleep it off, but after waking the next morning still unable to see a thing he went to Taranaki Base Hospital.