Hey @Keyguyperson did they have subsonic ammo and silencers in the 1940's?
I'd go with Option 2. It allows the world to have a stronger sci-fi feel to it, without making it just an "everyday thing". This way, Cybernetics can be an actual threat, but not something Vamps have to constantly worry about/be prepared for.
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You could theoretically just make the pupils visible. Nobody would really notice a couple tiny black dots floating in front of them. Or you could go full invisibility and say that A Wizard Did It.

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1. You'd probably have trouble seeing things because no light would reflect??? /not a science major
2. @ Aaron??????
Just had another google search gem:
"How can you make a sniper rifle quiet enough to not be noticed in a large city?"
I'm going to go to jail.
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By the way, I'm not that hard core, it's just on in the afternoon! :P
And anyways, I'm not usually a violent potato as I'm generally light and fluffy by nature but I'm going to make that exam feel so damn objectified that it's going to go write a Tumblr post about it and then share it on Pinterest.
Oh God, I'm making Tumblr jokes. This Tater needs sleep. Bon voyage or something?