D-EYE is a company that designs and manufactures ophthalmology diagnostic instruments. It offers a smartphone-based retinal imaging system that is a combination of lenses and filters and a mobile app that turns a smartphone into a digital direct ophthalmoscope. D-EYE device can be used as a screening tool for detecting diseases, including glaucoma, diabetic retinopathy, macular degeneration, and more. In addition, the company provides smartphone-based retinal imaging instruments for animals.