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A paper published in the Journal of Ophthalmology describes an inexpensive, portable camera that can photograph the retina without the need for pupil-dilating eye drops, ScienceDaily reported Monday.
The pocket-sized prototype, which costs around $185, features a low-cost, single-board that hooks up to an infrared camera, and a dual infrared- and white-light-emitting diode.
The camera emits infrared light, which the iris does not react to, to focus the camera on the retina, after which a quick flash of white light is delivered as the picture is taken.
According to the news source, the camera photos display the retina and its blood supply along with the portion of the optic nerve that leads into the retina, and can reveal health issues, such as diabetes, glaucoma and elevated pressure around the brain.
Co-author Shizuo Mukai said "this is an open-source device that is cheap and easy to build," adding that "we expect that others who build our camera will add their own improvements and innovations."
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