BLOOD VESSELS OF THE CONJUNCTIVA

Abstract

A new technic of high speed photography produces magnified pictures of an excellent character and offers an additional method for study of the eye. The blood vessels of the conjunctiva have been found to be unusually available for photography because they lie in an almost transparent medium, and the red vessels afford good contrast to the background of the opaque white sclera. I have photographed the eye with many types of cameras but have found drawbacks with all of them. The intensity of light is limited by the tolerance of the human eye, and that is greatly diminished with disease. As the eyeball is curved, it is difficult to get a large section of it in clear focus on a flat film. Even in a cooperative patient there is constant movement cf the eye, which blurs the picture. High speed photography overcomes many of these difficulties. THE CAMERA The essential