> Initially, the designers wanted to put small changeable batteries in the new glasses. Beskind pointed out to them that old fingers are not that nimble. I've

> Initially, the designers wanted to put small changeable batteries in the new glasses. Beskind pointed out to them that old fingers are not that nimble. I've watched my father change batteries on his hearing aid, and this is very true (he is also 90 with macular degeneration). The hearing aid battery people now sell their batteries in dispensers that make it easier to insert the battery, but they don't help with removing the old dead battery - he has to shake it out over the trash can. Sometimes he loses his grip and the entire hearing aid ends up in there. Or the battery misses the can and ends up on the floor where he can't see it, and it then acts like a ball-bearing and becomes a fall hazard. So a stupid $2 battery that gets changed a couple times a week could potentially result in a broken hip, which drastically shortens the lives of seniors. Thinking about the entire life-cycle of a product and how the customers are going to use it is always worthwhile.