| Early diagnosis, which involves looking for tiny areas of blood vessel damage in the eye, is invaluable for diseases such as diabetes where prompt medical treatment can prevent the onset of blindness. This image taken with the smart ophthalmoscope shows veins and arteries leaving the eye through the head of the optic nerve, or optic disk. If you look carefully you can see the nerve fibers which carry visual information to the brain. (credit: Samantha Lee, Joe Zohng and Luis Diaz-Santana - City University, London) |
