See Helena Ekholm's explanation in the player above.
Below she explains what a diopter is:
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What is a diopter?
Helena Ekholm after Sebastian Samuelsson's World Cup fiasco: "Perhaps got an edge"
2023-02-08T16:57:07.601Z
Sweden and Sebastian Samuelsson had a chance for a medal in the mixed relay. But then Samuelsson incurred three penalty rounds for the prone shooting and now SVT's expert Helena Ekholm explains what may have happened. - My first thought that came up was that something had happened to the diopter, she says.
Source: svt