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I would hope that Sony knows how to shield the digital circuitry on their MP3 player. I'm still not convinced that you'd be able to do anything about audio noise level by redesigning the micro SD card. The only source of audio noise would be slow things such as page read-related current pulses, and there's not enough real estate on a micro SD board to provide a low frequency filter.
This is the real problem, and it's on all religious people to behave as if every other religion (and every form of non-belief) is as valid as theirs is. Oh, and Thou Shalt Not Kill.
I am over 50 and have always had astigmatism, and deal with the lingering and ever-changing effects of a shingles scar on one cornea, so my glasses are anything by simple.
My computer glasses solution is to have one pair of trifocals for general use, and a pair of bifocals ground to give a general view of the computer screen, with a close-up along the bottom for looking at the gizmos I'm designing circuit boards for when I'm on the computer. It works pretty well, other than the inconvenience of having to change glasses a lot.