But new Johns Hopkins research in mice suggests that neural stem cells, the bodyâs source of new brain cells, are resistant to radiation, and can be roused from a hibernation-like state to reproduce and generate new cells able to migrate, replace injured cells and potentially restore lost function.
Pupillary Distance (PD) You'll need to know your PD if you want to order glasses from EyeBuyDirect. Don't worry if your glasses prescription doesn't include your PD, we can show you how to measure it by yourself. How to measure your pd
If you are ordering single vision glasses, you can measure your PD online here: Measure My PD Make sure when you are ordering your glasses online that you choose a frame that will fit (use your current frame's size for this), and also check to see if the website you're ordering from has a solution to measuring vertical fitting height.