Figure 2From: Ultrasound-assessed perirenal fat is related to increased ophthalmic artery resistance index in HIV-1 patients Assessment of ophthalmic artery resistance index with patient lying supine with eyes closed and using an ultrasound frequency of 7.5 mHz. The transducer is applied to the closed upper eyelid using a thick layer of acoustic gel, minimizing pressure on the globe.Back to article page