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Re:Why are glasses so expensive? The eyewear industry prefer... by Buttons840 on Wednesday January 23, 2019 @03:17PM (#18982364)
Clever. Seems obvious in retrospec though.

It reminds me of collimating a telescope with a laser or your eye. You basically look down the optics of the telescope and you should be staring into your own eye, or if you use a laser the laser should be reflected by the mirrors exactly back into the emitter.

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