Why can I wear prescription reading glasses as if they were regular glasses?

[Uvalda]

I am farsighted. When my glasses break or somehow become unwearable I can just throw a pair of reading glasses on and they work perfectly fine. So why is this?

[Uvalde]

That is because your prescription which is used for distance sight is just like a reading glasses prescription.The farsighted people are wearing a plus lens to view in the distance and the close presbyopic people are wearing a plus lens just for reading.

[Uxbridge]

It is OK for people with farsighted wearing reading glasses. That because both farsightedness and presbyopia need help to see near, and prescription reading glasses are made to help people to focus near things. Eyeglasses is just a device to help people see clear when you wearing it. If you wearing the right reading glasses that meet your vision requirements, sure, you can get perfect vision through the lenses.