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Abstract #15415 Published in IGR 1-3
Scanning laser polarimetry via intravitreal silicone oil
Holló G; Bereczki A; Milibák T; Süveges IActa Ophthalmologica Scandinavica 1999; 77: 519-521
PURPOSE: To investigate whether scanning laser polarimetry, a promising new technique for the early detection of glaucomatous nerve fiber loss, is a suitable method for measuring retinal nerve fiber layer thickness in eyes with intravitreal silicone oil. PATIENTS AND METHODS: Eleven eyes of 11 consecutive patients two days to 16 months after successful vitrectomy and intravitreal silicone oil injection, and 12 eyes of 12 consecutive subjects, who had never had any vitreoretinal surgery, were examined using the GDx Nerve Fiber Analyzer. Three individual images were computed to a mean image using the software in each case. RESULTS: 'Variance', a software-provided parameter, which represents the differences between the individual images used to calculate the mean image, was higher in the 'silicone oil' group (unpaired t test for different variances, p=0.02). Good-quality mean images with a 'Variance' value similar to that of the control eyes were obtained in seven of the 11 eyes. Characteristic artifacts caused by intravitreal silicone oil were observed in five of the 11 cases. CONCLUSIONS: Successful scanning laser polarimetry is possible after vitrectomy and intravitreal silicone oil injection, and may help to monitor the retinal nerve fiber layer of these eyes in case of silicone oil-induced glaucoma.
Dr. G. Holló, 1st Department of Ophthalmology, Semmelweis University Medical School, Budapest; Hungary
Classification:
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)
