You may not have realized it, but the glasses on tip of nose thing where people lean forward to look at you is because reading glasses make things blurry at conversation distance. Basically this: https://levinsoneyeclinic.com/wp-content/uploads/2021/08/shu...

However, sometimes people don't bother and they really can't see you very clearly. But, you can still track the body language from where they eyes are looking so it's fine, that's the difference clear lenses make.