Were smart glasses used in Singapore to film 2 female students?

Singapore police have launched an investigation after a video of a man allegedly filming female students using smart glasses went viral, sparking concerns about privacy and safety.
In the social media video, a man wearing black-rimmed glasses and a face mask is seen walking behind two female students wearing what appear to be uniforms from Raffles Institution, a premier school in the city state. The girls seem unaware of his presence.
The man clutches his phone to his chest and presses what looks to be a button. Noticing that he is being filmed, he abruptly makes a U-turn and walks off in the opposite direction.
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