Comparaison de l'échographie à 10 MHz, à 20 MHz et de la tomographie en cohérence optique dans l'évaluation des trous maculaires

The 10-MHz ultrasonography is very useful for an overall assessment of the vitreous body, its mobility, and in searching for PVD. The 20-MHz examination gives very valuable information on the analysis of the vitreomacular junction, approaching the precision level provided by OCT. It demands a very rigorous examination protocol. OCT, however, remains better for the fine morphological study of this zone, unless opaque media studies are necessary to determine the maximum frequency usable to increase the space resolution of the lesions of the posterior pole. In this case, the combined ultrasonographic study using 10 and 20 MHz provides a valid diagnosis and a therapeutic approach to the posterior pole.