Can your eyesight get worse by wearing glasses that aren't yours?

Ok, so my friend's eyes aren't that bad, and he doesn't wear glasses. I do wear glasses, and my eyesight is pretty bad and my eyesight is bad as well. Well for a few weeks, my friend wanted to borrow my glasses, and i let him.... and now his eyes are bad. I told him that it's my glasses fault, but he denies that. Is it true that your eyesight can get worse if you wear glasses that are not yours?