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
savannah the prescription on your contact lenses are greater than that on eyeglasses since eyeglasses are usually about 12 millimeters from the eye the prescriptive power of a contact lens which is positioned directly on the tear film of the eye will be slightly less nearsightedhis depends on how strong your power is a contact lens prescription can be the same as a prescription for glasses when the prescription is a lower power ie 4 00 to 4 00 and there is absolutely no astigmatism present