We do not have enough information at this time to truly advise anyone about whether poor visual performance means they should see their doctor. Think of the Challenge as assessing visual performance much like lifting weights tests your physical strength. If you are the weakest in strength for your age, or have the slowest reflexes, you may want your doctors opinion about this - it is your judgement. When we have sufficient data about the Challenge in this regard we will upgrade this information. Someone with healthy eyes can occasionally perform poorly even on in-office visual field testing.
Reliability is an issue even with every professional test.
When you complete the Challenge you will be given an indication of how reliable your visual performance assessment is felt to be. If successfully validated, the Challenge is designed to be used as a supplement to regularly scheduled eye exams for your own personal information on your visual performance. After all, you are one of millions spending more and more of their time in front of PC's. Now you can spend a few moments a few times a year and compare your visual performance with your own past scores and others your age. It may allow some relative comparison of your visual performance with others your age.