The diameter of the blood vessels around the optic disc is about 150 ?m, and an ophthalmoscope allows observation of blood vessels with diameters as small as 10 ?m.
32.
Four thousand color illustrations and photos accompany entries that range from the helpful ( " ophthalmoscope " ) to the superfluous ( " Oprah Winfrey " ).
33.
Under its Small Business Innovation Research grant from the National Eye Institute, Optimum will have six months to create a new kind of ophthalmoscope for the burgeoning field of telemedicine.
34.
As a nurse holds the hands and head of one of the seven surviving octuplets born in Houston in December, a doctor peers at the back of the eyes through an ophthalmoscope.
35.
In 1896, Allvar Gullstrand incorporated the disk in his ophthalmoscope, examining photographs of the cornea via a microscope and was able to manually calculate the curvature by means of a numerical algorithm.
36.
Optimum's device, still in the early stages of development, would solve that problem by enclosing optical fiber, imaging technology and communications equipment in a device similar to a traditional ophthalmoscope.
37.
"It's a progressive disorder of the optic nerve, characterized by a specific pattern of visual field damage and optic nerve damage that we can see with an ophthalmoscope,"
38.
In 1915, Francis A . Welch and William Noah Allyn invented the world's first hand-held direct illuminating ophthalmoscope, precursor to the device now used by clinicians around the world.
39.
Most recently, Boston Micromachines has developed an Adaptive Optics Scanning Laser Ophthalmoscope for high-resolution " in vivo " imaging in the human retina for use in pre-clinical studies.
40.
Traditional ophthalmoscopes are about as big as a telephone handset and allow a health care worker to peer through a lens and see a magnified vision of the back of a patient's eye, or retina.
