Retinitis pigmentosa is an incurable condition that slowly impairs eyesight and ultimately results in blindness. A retinal implant device restores vision to patients rendered blind by a rare, degenerative eye disorder which has been shown to be long-term effective, safe, and reliable by the clinical trials and is popularly known as the bionic eye. The Argus II device was designed to provide patients with some functional vision after they had lost their sight as a result of the disease. Patients with retinitis pigmentosa can use the device to view light patterns that their brains eventually learn to interpret as images. A compact computerised video processing unit receives visual data from the patient's glasses-mounted micro video camera. The retina, a layer of light-sensing cells along the back of the eye, is implanted with an electronic device, and this computer converts the image into electronic impulses that are relayed wirelessly to the device. According to the visual function results, up to 89% of the subjects performed noticeably better with the device. Two-thirds of the individuals had no major adverse events related to the device or surgery after a year. Three years later, there had been no device failures. This study demonstrates that the Argus II system can effectively treat retinitis pigmentosa patients who are profoundly blind.