Eye exams are an essential tool for detecting diseases such as diabetic retinopathy, glaucoma, and age-related macular degeneration, which together account for much of the world's vision loss. A key part of this process is fundus imaging, where doctors photograph the back of the eye to look for early signs of disease. Yet the cameras used for this task are expensive, difficult to operate, and require careful focusing, limiting their availability in many clinics and underserved regions.