Tiny robots that help prevent blindness

    Tiny, glowing robots injected into the eye to monitor oxygen levels could soon be on the front lines in the efforts to help prevent blindness.
    The robots will be designed to be injected into to vitreous fluid of the eye and steered via magnetic fields. They will be coated with a dye that will glow when exposed to certain wavelengths of light and fade quickly in the presence of oxygen, which would allow doctors to monitor the oxygen levels of the eye by applying a pulse of light and observing the duration of the fluorescence.