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
Getting it right is one of the most important things in making glasses fitting perfectly your vision condition. There are basically three ways in writing PD. They are OU, which is for both eyes; OD, which is for the right eye and OS for the left eyes. PD can be measured with the help from one of your friends or just by yourself in front of a mirror.