DYNAMIC IMAGING TECHNIQUES FOR OPTOMETRIC EDUCATION; A MODEL FOR TEAR BUT ANALYSIS

Title DYNAMIC IMAGING TECHNIQUES FOR OPTOMETRIC EDUCATION; A MODEL FOR TEAR BUT ANALYSIS
Author, Co-Author Etty Bitton, John Lovasik, Linda Trick
Topic
Year
1992
Day
Monday
Program Number
Poster 63
Room
Great Hall
Affiliation
Abstract The tear breakup time (BUT) is dependent upon the integrity of the mucin layer of the tear film. It has been used traditionally to identify contact lens wearers who are at risk for failure because of inadequate wetting and lubrication of the cornea. To date, there have been no studies that have correlated the absolute BUT with the dynamic changes in pattern of the tear film in the development of the BUT. This report highlights a unique computerized system capable of recording and quantifying sequential changes in the fluorescein tear film pattern. The tear film is viewed through a biomicroscope (Zeiss 75 SLT*FL) and relayed via a high resolution RGB video camera (Hitachi CCD Color Camera HV-C10) to a video cassette recorder (Sony Hi-Fi VHS Video Cassette Recorder, BR-S601MU) while being displayed on a high resolution monitor (SONY TRINITRON Color Video Monitor, PVM-1943MD). A Macintosh-based digital image analysis system is used to analyze the analog-stored data frame by frame. Application of this technique for educational purposes include corneal physiology, contact lenses, anatomy, physiological optics and ocular pathology. The system described can be used for; 1) Teaching in an academic/clinical setting; 2) Assessment of tear film dynamics, pupil reactivity, ocular and lid movements; 3) Patient management/education in cases of corneal pathologies, contact lens problems, etc...; 4) Recording posterior pole structures. While the system is fairly costly, and bulky, it has important clinical and research applications in academic, institutional, and hospital environments. We provide a detailed example of how this unique system can track the geometric changes in the rupture of the tear film. This type of information should generate new and practical information for the optometric educators and researchers in their respective environments. The system is currently used in our graduate program to permit student groups to experience quantitative m
Affiliation of Co-Authors
Outline