[Use of the dia-contact method in ophthalmology. A new method of fluorescein angiography presentation]

An innovative presentation of fluorescein angiograms on radiographic film, called "dia-contact", is described. Photographs are produced by the classical procedure of contact-printing on subtraction film and are of very high quality resolution. Less expensive than conventional prints, the resultant document is easy to copy and file. The reading of this document with the help of two + 10 lenses, allows a sequential analysis of the angiogram and a stereoscopic interpretation alternatively. The image can be enlarged without loss of resolution by means of a microfilm reader device. This method requires a certain amount of self discipline, in that a new habit must be learned. However it rapidly proved itself invaluable in the author's daily practice.