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  Indian J Med Microbiol
 

Figure 1: (a) The ultrasound of the eye preinjection with axial scan pass through the optic nerve. (b) The ultrasound 5 minutes after injection of the local anesthetics in the longitudinal axial plan at 6 a.m. of the globe, the red arrows indicate the hypo-echogenic track of the tracked local anesthetics in the subtenon space. (c) The same globe 10 minutes after injection with axial plan through the optic nerve and the red arrows demonstrate the hypo-echogenic pattern around the optic nerve giving the characteristic T sign of perfusion of local anesthetics

Figure 1: (a) The ultrasound of the eye preinjection with axial scan pass through the optic nerve. (b) The ultrasound 5 minutes after injection of the local anesthetics in the longitudinal axial plan at 6 a.m. of the globe, the red arrows indicate the hypo-echogenic track of the tracked local anesthetics in the subtenon space. (c) The same globe 10 minutes after injection with axial plan through the optic nerve and the red arrows
demonstrate the hypo-echogenic pattern around the optic nerve giving the characteristic T sign of perfusion of local anesthetics