Mysterious flip camera red laser/ir light

I recently noticed that whenever the camera is active and flipped, there is a faint red laser textured glow coming out of one of the small "sensor holes" that i call it placed above the led flash . This can only barely be seen when its dark but it would be really interesting to hear what this does. I thought it would be useful for face unlocking in the dark, but thats clearly not what it does. It could just be a part of the image processing...?

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