As someone who has worn glasses for almost all of my life, I can't imagine what it would be like to go about everyday life without corrective lenses or some other form of vision correction. How did Hunter-gatherers deal with this? How were serfs in the middle ages able to go about daily life without some sort of visual aid?
This question gets asked from time to time, and while there is always room for more discussion, you might be interested in reading e.g. this tread, with a concise answer from /u/rocketsocks