| ORIGINAL ARTICLE
|Year : 2005 | Volume
| Issue : 1 | Page : 43-47
Can Ocular Torsion be Measured Using the Slitlamp Biomicroscope?
Mihir T Kothari1, G Venkatesan1, Jugal P Shah1, Kulin Kothari1, Praveen K Nirmalan2
1 Bombay City Eye Institute and Research Center, India
2 L V Prasad Eye Institute, Hyderabad, India
PURPOSE: To evaluate and compare a stereo-biomicroscopic technique of ocular torsion measurement with fundus photographic technique. METHODS: This prospective masked observational study included 72 eyes of 36 consecutive subjects with normal ocular motility. The disc-foveal angle was measured by two masked investigators using a slitlamp stereo-biomicroscopic and fundus photographic technique. RESULTS: The mean age was 13.7 years (6 - 44 years), and 15 (41.6%) were males. The average torsion using the slitlamp technique was 5.5 3.3o and 6.1 4.3o with fundus photographic technique. Clinical agreement between the two techniques for 5o and 6o torsion was 81% and 90% respectively. The average difference between the two techniques was 3.0 2.6o. The mean inter-ocular difference was 3.3 2.7o (SD, 2.77) and 5.5 4.6o using the slitlamp and fundus photographic technique respectively. The Pearson correlation coefficient (r2) was 0.5
CONCLUSION: The fundus photographic technique remains the gold standard test for the measurement of ocular torsion. The slitlamp biomicroscopic method can be useful where a fundus camera is unavailable. Further studies are required to test the repeatability of these tests.
Mihir T Kothari
Bombay City Eye Institute and Research Center, Victor Villa, 5 Babulnath, Mumbai - 400 007
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