I'm gonna throw in my 2 cents worth..................
It is my understanding that most, if not all drugs come from some sort of plant life. So, marijuana could definitely have some sort of medicinal purpose. Look, God made it for a reason. I know, there's poisonous plant life out there, too, that God made. So, proceed with caution and ask God for wisdom.
Hey Didy, your grandmother wouldn't by chance have any recommended plant life for eye sight? My brother could really use something!