Ok viscid I'm going to try another approach since you don't seem to be understanding any of the posts, or concepts of light or even space in general.
The idea of holding the light to the side is probably to lessen the intensity of the light. Reason being, if you were shining a flashlight directly into your eyeball at arms length, you better pray your pupil contracts and stays contracted. If this were not the case, testing for adrenal fatigue or piracetam non response would not need a subtle test (and I cringe saying this, I would not want to call it a "subtle" test, but I'm having to dumb down things for you). Instead, you would be looking for people with adrenal fatigue or piracetam non-responders through BLINDNESS. Dramatic fluctuation in the presence of direct light shined on your eyeball would be very very bad, and much more significant.
Again, since you can't possibly conceive of what acantelopepope is saying, or are more likely being stubborn and a prick refusing to admit you've made yourself look stupid, try this. In the dark, take a VERY dim light source, or find a way to diffuse a light source (e.g. toilet paper over an led, or something like this). Shine it directly in your eye, make completely sure the light is hitting the full area of your eye, is directly in front of it, and the light reflects perfectly throughout the eye, since you can't conceive of the idea that light held from an angle still stimulates the eye. The pupil will probably still fluctuate if it did to begin with. Again, this is not normal. Just try this, or the original test on someone else.
Or another experiment. Find the brightest light you can possibly find, like halogen headlamps or something, I don't know. Put the source at an arms length to the side and turn it on. Now sit there for 3 hours. If you're right, you can use the "angle of the light" to protect you from any eye damage. My guess is it won't.
Are you surprised your posts are being deleted? You've hijacked the thread with your bad attitude and stubbornness.
I am criticizing the test and the thread, which apparently you are too stubborn to understand. There were conclusions being drawn from a test which was poorly instructed, and those conclusions drawn are causing alarmist reactions from those reading this thread. The dramatic oscillations people got when performing this test was likely due to them shining a beam of light at their eye from an angle, causing the pupil to contract and expand as it blocks/receives light.
A similar test, done properly, could very well indicate that piracetam causes adrenal fatigue.
Different flashlights have different focal lengths, some are quite diffused, while others have a very straight beam. To properly do this test, you will need to diffuse the light source with something over the beam of light to obtain a bright, quasi-omnidirectional light source, as you have suggested. This will eliminate much of the methodological flaws inherent in the original post; It is unfortunate that a properly diffused light source was not originally suggested.
"To properly do this test, you will need to diffuse the light source". Agreed. Look up diffuser (to spell it out, a diffuser is something which diffuses - what you're advocating). Per wiki -- "In optics, a diffuser is any device that diffuses or spreads out or scatters light in some manner, to give soft light."
Are we still in agreement? We can agree we're looking for soft light. "Size of light source. The larger the source, the softer it becomes." This is probably what you mean by "quasi-omidirectional light source" - eg a broad rather than focused light source, eg soft light. Again, we're looking for soft light.
What is soft light? Wiki again -- "The softness of a light source can also be determined by the angle between the illuminated object and the 'length' of the light source (the longest dimension that is perpendicular to the object being lit). The larger this angle is, the softer the light source."
Ergo -- holding the light to the side is a way of diffusing, it is the diffuser you've suggested. The very angle you've been complaining about so much.
"causing the pupil to contract and expand as it blocks/receives light." Unless you are holding the flashlight in a way that casts solely a sliver of light across one portion of the pupil, and nowhere else, then pupil contractions do not block light. Rather, they are trying to adjust to a certain diffuse intensity of light which bathes the eye. It is receiving light the whole time - the pupil contractions do not "block" light, that is unless you're going way out of your way to cast that small amount of light across a portion. If pupil contractions blocked light, tricking the pupil into expanding because it thought all light had gone, then you would not be able to see your whole eye, only that sliver. Again, this would be an impressive misinterpretation of the test.
"The test is dumb the thread is dumb" is not "criticism" Viscid. Nor is baseless and invective arguing. My vote is we summarily delete any more posts by you on this matter and cease responding to them, as half of what could be a valuable thread has become explaining to you obvious things. If you want more explanation, though I doubt any actual sincerity in this, just PM someone.