I know this may sound DUMM but I (don't laugh) SQUINT when I'm an a harmonic that is hart for the SAT to read. This dosen't have anything to do with my etes or glasses(trifocals)..... What it does is screen out a lot of the background light from the room, and (more important) it also mscreens out a lot of the visual "noise" in the red dots, and allows the true reading to be seen and understood. I hope this helps. Tom (tunerguy) Cobble
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