At face value, seems like it could be interesting, but there's a lot to be skeptical about. How can I be sure that I'm doing the test correctly without independ

At face value, seems like it could be interesting, but there's a lot to be skeptical about. How can I be sure that I'm doing the test correctly without independent verification? Even with their "anti-cheating" instructions, I still wouldn't completely trust myself. Also, it doesn't seem like there's a way to verify if the results are accurate or not. Even if they are off by 1%, getting an inaccurate prescription (and consequently glasses/contacts) would be a totally unacceptable outcome for a service like this. Unlike services like https://www.plushcare.com/ https://www.plushcare.com/ which use consumer devices as a subsitute for the office visit, Opternative seems to be using the consumer devices to replace the office visit, the doctor, and the traditional eye examination devices, and this seems a bit dubious to me. On the other hand, if this service actually can consistently deliver, that would be so, so awesome.