I like removing my glasses when I go into stores.
What makes you want to take your glasses off?
I don't like others looking at me so removing my glasses is a way to avoid that.
Does that ever make the trip harder for you? If you need glasses to see you should definitely use them.
I'm only going to be in a store for a couple of minutes anyways.
Even if it's just a for a few minutes, you should still wear your glasses if you need them to see. I understand having insecurities, but people probably aren't watching you as much as you assume.