Ocular ultrasound is a non-invasive test that uses ultrasound waves to create an image of the structures inside the eye. It is useful in cases where there your ophthalmologist does not have a clear view into the retina. (such as with a dense cataract or hemorrhage in the eye. In addition, ocular ultrasound allows for the diagnosis and measurement of any structures or masses within the eye. Ocular ultrasound is performed in the retina clinic and takes approximately ten minutes to complete.