I am currently stuck in the wilderness, and I have been out here for a while. I want to focus light. There are various reasons for wanting to do this, with the two biggest reasons being for vision and for fire starting. It does not need to be anything fancy, not even to help with the vision: my eye sight is just barely too bad to make out the north star easily, so a slight magnification would help.
Are there any resources that I can forage or anything I can create while in the wilderness for focusing light similar to a glasses lens or a magnifying glass?
My glasses for my poor eyesight are either lost or smashed to pieces. All of my clear bags have long since been punctured, and I have no other clear containers for holding water in, otherwise I might try to use water to focus the light.
I am assuming creating glass from sand is not an option since I have seen backyard tinkerers with the proper academic knowledge and decent tools fail to create good glass. If you think this is an invalid assumption, then feel free to challenge me on that.