Silly reasons people give to avoid buying spectacles-
1) Waiting for an offer
2) Looks stupid
3) Waiting for my friend to buy first
4) Makes me feel old

Thought of all the wild experiences that a person might undergo-
1) Snake attack
2) Wild dog attack
3) Shark attack
4) Alligator attack

And these situations need full attention, you can't escape an attack if you can't see one...