Hong Kong's 2014 protesters had their umbrellas - 2019's have their eye patches.
Protesters have taken to wearing the bloodied patches at the city's international airport in solidarity with a young woman who was injured in her right eye during a violent police crackdown at the weekend.
Media reported she had been hit by a beanbag round fired by police.
For the protesters, it's a sign of police brutality.
(SOUNDBITE) (English) HONG KONG PROTESTER KNOWN JUST AS 'LEO', SAYING: "This is a sign to show that we do not tolerate the violence from the police force." (SOUNDBITE) (English) 17-YEAR OLD PROTESTER, FAREN LAO, SAYING: "We need the world to see how shameful Hong Kong police are." (SOUNDBITE) (English) HONG KONG PROTESTER KNOWN JUST AS 'ELAINE', SAYING: "By wearing these goggles, I kind of experience what the girl is facing, that is losing her eye sight.
But for me, it's just for one day but for her it's forever.
The cost is too much." (SOUNDBITE) (English) 30-YEAR OLD PROTESTER, YUKI LEUNG, SAYING: "I would like to use this action to tell the government and also the police that we don't stand their brutality and also their violence.
We will fight til the end." Ten weeks of increasingly violent protests have roiled the Asian financial hub as thousands demonstrate against a perceived erosion of freedoms and autonomy under Chinese rule.
China has condemned some protesters for using dangerous tools to attack police, calling the clashes "sprouts of terrorism".
Attention now on what Beijing's next move will be, as the world watches on.