.... as the topic here is a bit unique ....
Silver - Perhaps not completely unique since there is further recent comment at Post 1743 on
http://www.pprune.org/medical-health...-vision-59.htm
and probably more earlier on in that lengthy thread too.
I have also heard of unverified claims that "pinhole" glasses (qv) can help to improve visual acuity, and I've certainly lost count of the number of times making an emergency "pinhole" by curling my forefinger behind my thumb has saved the day when I have no glasses to hand!
Jack
Jack