The subretinal implant strategy will likely work the best in the future. The subretinal implant avoids any form of wireless data complications, such as interference from other wireless devices and signals, or hacking, which has seemed to be a concern in class lately, because it does not use an external camera. Instead, it directly detect images and stimulates the photoreceptors in the retina so the images can be sent to the brain. Also, because all of the parts are within the body, there would be less parts of it to potentially lose (unlike the presumably expensive camera-containing glasses of the eprietinal device).
There are currently subretinal devices under testing that use the light received through the eye as a power source; though this currently is not the most powerful device by far compared to the exernally-powered epiretinal and subretinal devices, this particular subretinal device shows a lot of promise in that it would need to consist of one chip only, making for a simpler implanaion procedure and for an altogether less invasive device. Once technology improves enough, I believe that this subretinal implant will come out on top.
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The fact that the subretinal implants avoid any wireless devices and signals, I agree, should make the implant less problematic. Using the photoreceptors to send the images to the brain also makes the subretinal implant more efficient. I agree it is the better implant.
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