VEGAS MYTH BUSTED: Secret 2-Way Resort Mirrors & ‘The Finger Test’
Posted on: March 2, 2026, 07:21h.
Last updated on: March 1, 2026, 10:34h.
In bathroom mirrors with TV screens — such as the ones installed at high-end properties like the Wynn, Venetian and Cosmo — the black borders around TV panels supposedly conceal small pinhole cameras. These cameras, so conspiracy theorists claim, record guests using the bathroom for casino databases or high-roller blackmail.
“Be careful with that bathroom, most new TVs have cameras,” warns Redditor @One-Bank2621 in this this 2025 thread. “And then they will slap a mini camera in those black bars of that TV,” replies @pervysage19.
Holding a Mirror to Reality
Any mysterious black bar or dot you see along the edge of a mirror-embedded screen is an infrared receiver for the remote control and a motion sensor used to power down the screen when no one is at the sink.
Because the TV is mounted behind a thick sheet of mirror glass, the internal IR sensor of a standard TV can’t detect your remote signal, so manufacturers need to wire an external sensor to the front. (The company Electric Mirror lists this as its “Crystal IR Receiver.” It has no lens, no image sensor and no data-out pipe for video.)
But what about that creepy red glow some guests report seeing when the bathroom light is off?
It doesn’t signal an active secret camera, but is merely the power indicator light for the TV or ethernet.
Adding a camera to a bathroom mirror would be a felony violation of the federal Video Voyeurism Prevention Act of 2004 (18 U.S.C. § 1801) that no multi-billion dollar corporation would dare risk for some negligible “intelligence” on a valued guest. A massive violation like that would single-handedly tank the resort company’s reputation and stock price overnight.
So no, nobody is watching you floss naked while singing the chorus from Bruno Mars’ “Just the Way You Are” over and over.
Giving it the Finger
Say you’re staying in a sketchy Airbnb or small budget motel off the Strip instead, though — someplace the owner, property manager or even a previous guest could have performed some unauthorized bathroom renovations. That’s still more than incredibly unlikely. But, since we busted our main myth so early and have space to burn, let’s entertain your paranoia…
Videos like the one below will tell you to press your finger against the mirror. If there’s a visible gap between your fingertip and its reflection, then you’re safe. However, if your fingertip and its reflection touch, then you’ve probably uncovered a two-way mirror.
Warning: This is not a reliable test! No gap doesn’t automatically mean you’re being watched. It could just be a high-end “first surface” mirror, often used in precision displays to eliminate ghost reflections. And even if there is a gap, it still may be a two-way mirror.
A gap indicates only that the reflective coating is installed behind the glass. Two‑way mirrors are typically half‑silvered — reflecting between 30%-70% of the light and allowing the rest through. They perform best with the coating on the front, but can also be installed backwards to cheat the finger test.
Installing a mirror with the coating on the back will introduce ghosting (a faint double reflection) because light passes through the glass before hitting the reflective coating. But most people wouldn’t notice that. (In fact, even standard mirrors display some ghosting.)
And if the mirror is acrylic, which bends light less than glass, the ghosting will be even less obvious.
Right Way to Detect a Two-Way
The secret to all two-way mirrors is in the lighting. One side of a two-way mirror must always be brightly lit, the other side dark — ideally 10 times darker.
The observer (or camera) in the dark sees through the mirror, while the observer in the light sees only themselves.
Therefore, make your side the dark side.
Kill every light in the room and press your phone’s flashlight directly against the mirror. If it’s two-way, the beam will illuminate anything hiding behind it — because a two-way mirror has to allow some light to shine through each way.
This is a proven method not only for detecting a two-way mirror, but also for frightening away any special new friend you may have invited into your sketchy Airbnb for a nightcap.
Look for “Vegas Myths Busted” every Monday on Casino.org. Visit VegasMythsBusted.com to read previously busted Vegas myths. Got a suggestion for a Vegas myth that needs busting? Email corey@casino.org.
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