A Pocket Magnifier is a type of magnifying glass that comes in a handy size that is small enough to fit into your pocket or bag. They are great for people who always need it with them at all times of the day.
People normally keep them just in case they get caught in a situation when they can't read something - When you have this with you your mind will be as ease knowing you will be able to read and form or restaurant menu that gets thrown you way.
Some come with LED lights making them even better and more useful, you will definitely find a pocket magnifying glass that you will love. They are very comfortable and easy to use.