5.0 Obtaining Both Good Image Quality and Adequate Stereoscopic Effect
When obtaining stereo pairs, care should be taken that at least one member of the pair is of good technical quality with crisp focus. In many cases, it will be possible to obtain good quality in both members of the pair, but if this is not the case, the aim should be to obtain good quality in one member and some stereo separation between the members, accepting somewhat poorer quality in the second member of the pair, if necessary.
Dilation of the pupil to at least 6mm is important to permit good quality stereo photography. If the pupils cannot be dilated to at least 4mm for the screening visit, the subject should not be entered into the study. The cornea should be undisturbed by prior examination with diagnostic contact lens.
If the subject has great difficulty tolerating the screening visit photography procedure and the photographer thinks this will lead to a problem at follow-up visits, the situation should be discussed with the principle investigator and/or coordinator and consideration should be given to not enrolling the subject in the study.
For more suggestions regarding photographic technique, see Attachment A.
Copyright © 2001
Fundus Photograph Reading Center
Department of Ophthalmology and Visual Sciences
University of Wisconsin - Madison
The University of Wisconsin-Madison is an equal opportunity educator and employer
Fundus Photograph Reading Center
Department of Ophthalmology and Visual Sciences
University of Wisconsin - Madison
The University of Wisconsin-Madison is an equal opportunity educator and employer