A Riverside man told a Supreme Court jury that he lost the sight in his left eye after being punched by his former partner.
Shannon Watson said that he evaded two swings by Lisa Maree Doolan but a third got him "square in the eye".
He had undergone a corneal graft just the week before.
However, in an interview with police Ms Doolan, 44, said: "I don't recall taking any swings at his face, he was in my face, but there was no contact."
"I would never do something like that."
Ms Doolan has pleaded not guilty to causing grievous bodily harm to Mr Watson in an alleged incident at her Youngtown home on June 4, 2016.
Defence counsel Fran McCracken suggested to Mr Watson that vomiting may have caused the damage.
"I want to suggest to you that the force of the vomiting caused the damage to your eye " she said.
"That's ridiculous, you couldn't make this stuff up," Mr Watson replied.
Mr Watson and Ms Doolan were in a tumultuous relationship the night they went to a party.She left early and a confrontation occurred in the hallway when he arrived at her home.
"She fired a punch at me but I ducked out of the way but as I straightened up she let another one fly but it also missed," he said.
A third punch hit him in the eye.
The punch caused extreme pain and he went into the bedroom, panicked and later vomited.
Several witnesses gave evidence that Mr Watson told them soon after that he had been punched.
However, it took him more than a month to report the incident to police
Mr Watson's sister, Kristie McLaren, who went to the house said that Mr Watson said "keep away from her she's just hit me".
Ms McLaren said Ms Doolan responded :"Don't lie I didn't hit you.
Ms McLaren said she reported the incident to police because it was the right thing to do .
Mr Watson's GP Andrew Nolan gave evidence that Mr Watson said "his girfriend had elbowed him in the eye"-but his notes recorded the word "punched".
Ms Doolan said in her police interview that she could have pushed Mr Watson away but it wasn't to the face.
Ambulance Tasmania paramedics Matthew Geoghan and David Munting gave evidence that they did not take Mr Watson to hospital because he would not let them examine him.
LGH's Dr Peter Renshaw said the hospital had not recorded him saying he had been hit.
The trial continues.