An elderly patient woke up with only peripheral vision in one eye. Fundoscopy was non-diagnostic.
Ocular ultrasound showed the following:
Diagnosis: Macular hole
One Saturday evening, a dashing young emergency physician noticed a flashing arc of light in his eye whenever he moved it. The next morning, while on shift, he performed an ultrasound of his own eye (while simultaneously intubating). Check out the video!
Near the retina, you can see a thin white line separated from the back of the eye. As the eye moves, the line sways as if riding a fluid wave. This is the classic appearance of a posterior vitreous detachment.