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
Ask your eye doctor to take the measurement at the time of your eye examination. Call the last place that made your glasses for you and they should be able to tell you what it is. Go into any Optical facility and ask them to measure it for you. It will take only seconds to do and they shouldnât charge you for it.Use the new PDCaptureSM: FramesDirectâs Pupillary Distance Measurement Service.he first number is the P.D. number we require to make your lenses. The second number (63) is the near pupil distance. This number is only needed when reading glasses are required.