Im facing this problem. How can i solve it.

[hiflyer201]

It's a monitor problem. I have a curved screen and I don't think that helps matters. The video that Dale suggested is a good one and I've used it, but I finally decided to just self test the sensors in actual practice and go with that. They do work flawlessly in all directions. (Mavic Air). I ignore the vision sensor calibrate error. It is not a no fly item. All that being said I would probaly feel guilty flying drone with out at least forward sensors.