(via What are the Olympics Shooting Competitors Wearing On Their Faces? - Core77)
mechanical irises
Oh Ye-jin, the South Korean competitor who took Gold in the 10 Meter Air Pistol event this year, eschews the irises.

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seen from United States
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seen from China
seen from United States

seen from United States
seen from China
seen from United States
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seen from United States
seen from United States

seen from United States
seen from China
seen from United States
seen from United States
seen from United States
(via What are the Olympics Shooting Competitors Wearing On Their Faces? - Core77)
mechanical irises
Oh Ye-jin, the South Korean competitor who took Gold in the 10 Meter Air Pistol event this year, eschews the irises.