In 12 Angry Men, Fonda points out to one of the jurors of his experience of having ridges on his nose due to wearing glasses, which suggests the old dear who claims to have witnessed the accused with the knife was bullshitting because she had the same ridges on her nose.
No need for a retrial.
That's not the reason for the potential retrial. The reason is the juror lying about not being a victim of sexual assault during jury selection. The juror committed perjury to get selected. If they hadn't been asked if they had been sexually assaulted or he had told the truth, there wouldn't be a case for a retrial.
It seems trivial, but if I were on defence I'd want the rules followed. To make it more comparable to your movie Fonda would have had to have signed a document before being selected stating that he had never worn glasses. Obviously no such document was signed in the movie.
