They're expensive, but I figure I will want one even if it doesn't solve my rehearsal problem. It should arrive in time for an outdoor performance next Friday night, so that should be a good test. It's supposed to be 5 pounds and concealable under clothing, last about 2 1/2 hours. Just might prolong my singing career a bit. I know people can get them free, but I'd rather avoid the red tape and get it fast, especially since I am not an PWMS.
I also bought some dark reading glasses to try at work. I use +1.00 readers for computing. I have some yellow-tinted ones I found at the drugstore, and they help a bit, but I need something darker. My readers arrived today, and I'm having fun experimenting. Got two pair, one brownish and one greyish. I'll take them both to work, leave the best choice there, and bring the other home where I don't spend 8 hours straight looking at screens.
I'm thankful for Internet ordering and brilliant inventors.