text: This effect manifests alongside absent deep tendon reflexes and anhidrosis in Adie syndrome.
full_question: This effect manifests alongside absent deep tendon reflexes and anhidrosis in Adie syndrome. Lesions onthird-order neurons may be detected using the paredrine test for this effect in Horner's syndrome. This effectis caused by sympathetic stimulation of the radial muscle. When non-physiological, this response is also calledmydriasis and can result from damage to cranial nerve 3. Women sometimes induced this response to appearmore seductive by putting drops of deadly nightshade over their eyes. This response is opposed by the actionof the iris sphincter and is usually reversed upon exposure to bright light. For 10 points, name this process inwhich the eye lets in more light by expanding the pupil. 
first_sentence: This effect manifests alongside absent deep tendon reflexes and anhidrosis in Adie syndrome.
raw_answer: pupillary dilation [or light-near dissociation until "Horner's" is read; or mydriasis until it is read] 