Does that new device for eye exam work? can anyone use it or anyother app ?

In testing: There is a clever device from mit which will allow the performance of a basic refraction if is is perfected and approved. It will allow the provision of eyeglasses for those in need, without a professional examination. While there is significant value to such an exam, in the third world where uncorrected vision is a major problem, this could provide a less costly way to help.