Narcotic pain drugs contract the pupil.
Stimulants (including adrenaline) dilate it.
People taking opiates typically have what are called pin point pupils, in normal light.
I have never heard of this test. But I do know from my anatomy class that when a sudden pain is felt, the pupils will dilate in normal light.
Dentists use this marker when they are working on you. If you dilate suddenly, they know they are hurting you. (our classes were mixed and we had some dental students).
I think one can take any person into a dark room and watch pupils dilate, then shine a light and that one will constrict. How on earth can a doctor tell who is who, when everyone has this response? Now I could imagine the reverse. If you have pinpoint pupils from your opiate meds, and they DO NOT dilate in the dark, then I can see that happening.
Quote:
Pupil Size: Normally, both pupils (the black area in the middle of the iris) are the same size. Pupils become large (dilate) in the dark and become small (constrict) in bright light. Although some people have much larger pupils than others, large or small pupils by themselves do not necessarily indicate a problem or abnormality. The pupils tend to become smaller with age. Constricted or dilated pupils may be caused by certain drugs used to treat eye diseases. Pupil constriction may be caused by opioid drugs, such as morphine Some Trade Names
MS CONTINORAMORPH
. Pupil dilation may be caused by amphetamines, antihistamines, cocaine, and marijuana. Small, irregularly shaped pupils may be caused by syphilis.
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from
http://www.merck.com/mmhe/sec20/ch225/ch225b.html
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Weezie looking at petunias 8.25.2017
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