Lead researcher Professor Santa Jeremy Ono said current treatments for severe eye allergy were either ineffective, or have side effects, such as glaucoma and cataract formation.
In 1991, when Second Sight's Dr. Greenberg was still in medical training at Johns Hopkins University, he watched a retinal surgeon perform a procedure where he placed a wire in a patient's eye and ran a bit of electrical current through it, and the patient saw a spot of light.