[100kristine]

Adding a few things from the engineering side of things! :)

1. We're currently exploring doing a distance check via the webcam using triangulation and face detection to tell folks how far from the camera they are.

2. The average monitor won't add much noise - if we're going by in person eye exams as the gold standard - there's actually a lot of variance between various doctor's offices (lighting, use of a projector/mirror to simulate distance vs placing the chart on the wall).

There's an interesting angle to doing eye exams digitally where we may be able to be more accurate than in in person exam (based on institutional research studies - not something we've yet personally explored).

5. Really interesting and valid point - making these types of questions more interactive is definitely on our roadmap.

6. Clinical trials will help vet any methods we build to show how they compare to existing practices