The technique described of pressing the eyes while doing the rapid breathing is how I discovered the bright donut-shaped light in October 2020. I find that it works best if it is performed at the end of a thorough practice. I have seen many variations of this light over the years.

It maybe a good idea to experiment with it—do it at the beginning, middle, or/and end of a session to see the effects. Warning: Do not have a strong desire/expectation to see lights when performing this process. The strong desire/expectation will keep you at a lower state which may block this experience or it may cause the light to vanish quickly.