When you go to the eye doctor, you look at a chart and tell them what you can see. It's the same way for the cameras on spy planes — but their charts have to be big enough to see from 20,000 feet.

Travelers at Erie International Airport can check their vision before boarding their flight. A new interactive display in the secure passenger waiting room includes a vision chart, an Amsler grid to ...

As stay-at-home orders drag on, many of us are looking for ways to DIY tasks we used to outsource to professionals. While self-treating anything you’d normally visit a doctor for requires more care ...