There are plenty of reasons to buy side shields for eyeglasses. You do not have to work in construction or any other type of work that involves tools to need safety shields. I find that they are essential for being outside for long periods or for long drives. They come in handy when working on certain hobbies or chores, too.
The problem with finding the right ones is you have to be careful about getting the right fit. That can be hard if you shop for them online. However, I think the best deals and selection are online. There are some that come in combo kits so you can size them just right for the eyeglasses you wear on a particular occasion. I trusted the reviews I read online about the pair I bought regarding size and things worked out perfectly for me.
These are the best for keeping UV rays out of my eyes from any angle. They are easy to slip on and off when needed. A lot of people find that the clip-on ones are inferior. I don’t think that is the case. You just have to shop for a good quality pair of side shields, that’s all.