It was suggested that this hippus is concerned with cumulative asthenopia and/or general fatigue although the origin of hippus is still unknown. [tandfonline.com]

In healthy subjects, hippus is more likely to appear in fatigue and drowsy states ( Bouma & Baghuis, 1971 ; Loewenfeld, 1999 ), and mental activity, such as arithmetic calculation, causes its disappearance. [onlinelibrary.wiley.com]

Epilepsy causing pupillary hippus: an unusual semiology Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, United Kingdom Division of Neurophysiology,The National Hospital for Neurology and Neurosurgery [onlinelibrary.wiley.com]

During the 19th century many clinical correlations of dubious value were made between hippus and various dire afflictions, including especially migraine, epilepsy, neurasthenia, brain tumor, hysteria, syphilis, myasthenia and 1. [jamanetwork.com]

Hippus in Cheyne-Stokes Respiration, Arch Intern Med 122:116-121 ( (Aug) ) 1968. Crossref [jamanetwork.com]

Marked pupillary oscillations can be present in normal subjects or associated with different conditions: diabetic neuropathy, night blindness, Cheyne‐Stokes respiration, prolonged exposure to video displays, or tabes dorsalis ( Bouma & Baghuis, 1971 ; [onlinelibrary.wiley.com]

See Hiccup. hip·pus ( hip'ŭs ) Intermittent pupillary dilation and constriction, independent of illumination, convergence, or psychic stimuli. [medical-dictionary.thefreedictionary.com]

In some cases, large and slow pupillary oscillation accompanied by miosis was noted after near vision. [tandfonline.com]

Note the consensual miosis of the control eye due to the increased light capture of the dilated eye, which was significant in the TL group ( P 0.001, blue dashed line ). ( B ) There was no change (treated–control eye) in FFT frequency over time in any [iovs.arvojournals.org]

In contrast to our patient’s case, physiologic hippus is characterized predominantly by miosis. [onlinelibrary.wiley.com]

[…] eye-tracker output from a single subject from the tropicamide dark (TD) group at baseline and at 15 and 30 minutes. ( A ) At baseline, the control eye ( orange ) pupil diameter is slightly smaller than the treated eye ( blue ), demonstrating physiological anisocoria [iovs.arvojournals.org]

Design/Methods: We retrospectively reviewed the spontaneous pupillary oscillations of 8 patients with PD at different stages of disease (age 56-86 mean 71) and 11 patients with neurologic disease who were tested because of abnormal eye movements (age [n.neurology.org]

Marked pupillary oscillations can be present in normal subjects or associated with different conditions: diabetic neuropathy, night blindness, Cheyne‐Stokes respiration, prolonged exposure to video displays, or tabes dorsalis ( Bouma & Baghuis, 1971 ; [onlinelibrary.wiley.com]

They begin with a nonspecific experiential aura followed by what she describes as fluctuating changes in her perception of brightness and blurred vision. There are no other accompanying visual symptoms such as hallucinations or photopsia. [onlinelibrary.wiley.com]

Dermatitis 2(2): 136-137, 1991 Pupillary hippus. Neurology 37(3 SUPPL 1): 288, 1987 Susceptibility to induced visual discomfort during the menstrual cycle while viewing a visual display unit. [eurekamag.com]

[G. hippos, horse, from a fancied suggestion of galloping movements] hippus Small rhythmic variations in the size of the pupils. They are present in everybody and increase slightly at high luminances. [medical-dictionary.thefreedictionary.com]

This suggests that the reduction in hippus following tropicamide is related to blocking the parasympathetic input to the pupil rather than the change in relative SNS and PNS input that occurs during pupil dilation. [iovs.arvojournals.org]

Pathologic hippus, the phenomena of increased oscillation or their amplitude, is associated with aconite poisoning, altered mental status, trauma, cirrhosis, and renal disease; suggesting a common pathway of frontal lobe dysfunction. [grepmed.com]

It was suggested that this hippus is concerned with cumulative asthenopia and/or general fatigue although the origin of hippus is still unknown. [tandfonline.com]

During the 19th century many clinical correlations of dubious value were made between hippus and various dire afflictions, including especially migraine, epilepsy, neurasthenia, brain tumor, hysteria, syphilis, myasthenia and 1. [jamanetwork.com]

It is said that hippus once meant a twitching of the eyelids, and that at one time it was synonymous with nystagmus, but for at least 150 years it has referred only to the pupil and has not been used to describe other occular movements. [jamanetwork.com]

The most common diagnosis was nystagmus of unclear etiology. Pupil size of all patients was recorded in the same room with the same lighting using infrared video-oculography at 240 Hz. [n.neurology.org]

They begin with a nonspecific experiential aura followed by what she describes as fluctuating changes in her perception of brightness and blurred vision. There are no other accompanying visual symptoms such as hallucinations or photopsia. [onlinelibrary.wiley.com]

Pupillary dilation accompanying epileptic seizures is brought about by a superimposition of both sympathetic excitation and parasympathetic inhibition, as proven by pharmacologic testing ( Klein & Early, 1948 ). [onlinelibrary.wiley.com]

The first EEG change is a high frequency activity (20 Hz) recorded from electrodes TP8, O2, PO4 and T6, followed 4 seconds later by stereotyped 8 seconds run of rhythmic slow activity, maximal in the posterior region with right sided emphasis. [onlinelibrary.wiley.com]

Coronal and sagittal T 2 ‐fluid‐attenuated inversion recovery (FLAIR): Multiple ill‐defined areas of hyperintense signal in T 2 ‐FLAIR sequence suggested the radiologic diagnosis of cortical tubers. [onlinelibrary.wiley.com]