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
Obviously we cannot measure your PD over the internet, so it is best to make sure your PD is included in your glasses prescription. The Diagram below represents a PD of 62mm. If your prescription does not contain your PD: 1  Ask to have it measured at an optical shop â some may charge a fee.