Field-Deployment Diagnosis for Eye Trauma

J.V. Jokerst
University of California, San Diego, United States

Keywords: Eye Trauma, Imaging, Ultrasound

The current standard-of-care for diagnosis of ocular injuries is examination under a slit lamp microscope by an ophthalmologist and orbital imaging using computed tomography (CT) and/or optical coherence tomography (OCT). However, these are challenging in austere/remote settings such as the battlefield. Our objective is to build an iPad-sized photoacoustic ultrasound scanner that can detect 1 mm entrance wounds and/or rupture sites as well as retinal bleeding, detachments, and hypoxia. Ophthalmic ultrasound is particularly useful in identifying retinal detachment, foreign bodies, or penetrating trauma to the eye and can image through trauma, but ophthalmic ultrasound still lacks contrast and functional information about target tissue and the entrance wound/foreign body. Here, we propose to use photoacoustic ultrasound in the form of a lightweight and portable device to solve these major limitations. This approach significantly improves the contrast of acoustic imaging to solve two major problem areas: 1) it will identify the location of entrance wounds and rupture sites in traumatic eye injuries; and 2) it will can quantify bleeding in the eye as well as intraocular pressure and retinal oxygenation.