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Light entering the eye strikes three different photoreceptors in the retina: the familiar rods and cones used in image forming and the more newly discovered photosensitive ganglion cells. The ganglion cells give information about ambient light levels, and react sluggishly compared to the rods and cones.
Dilation and constriction of the pupil. Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve.. A constriction response (), [1] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti-hypertension medications.
The Neurological Pupil index, or NPi, is an algorithm developed by NeurOptics, Inc., that removes subjectivity from the pupillary evaluation. A patient's pupil measurement (including variables such as size, latency, constriction velocity, dilation velocity, etc.) is obtained using a pupillometer, and the measurement is compared against a normative model of pupil reaction to light and ...
What it looks like: Some of the signs of opioid overdose include unconsciousness, slow or shallow breathing, choking or gurgling sounds, discolored skin, and constricted “pinpoint pupils ...
In scientific literature such experiences have been referred to as death-related sensory experiences (DRSE). [3] Dying patients have reported to staff working in hospices they have experienced comforting visions. [4] [5] [6] Some scientists consider deathbed phenomena and visions to be hallucinations. [7] [8] [9]
Blocking acetylcholine receptors reduces the pupillary muscles' ability to constrict and causes dilation (which is critical in eye surgery procedures such as cataract surgery which require uninterrupted access to the inner eye via the pupillary aperture, thus requiring that the eye be both paralyzed and anesthetized before the procedure can go ...
On June 3, 2010, Emmy Award winner Rue McClanahan died of a stroke at New York–Presbyterian Hospital. She was 76, and despite the fact that her life was riddled with ailments and health crises ...
William Dale Archerd drank highballs, married frequently and despised 9-to-5 employment. He was Arkansas-born, slender, with pale blue eyes and wavy silver hair. He inspired romantic devotion in ...