A retrospective study of 117 hospitalized patients with hippus noted an increased 30-day mortality when compared to controls and adjusted for other factors. [6]

What is Hippus? Rhythmic constriction and dilation of the pupil. Can be easily observed when light is shined on eyes Hippus is however independent of light Often likened to a person dancing or a horse …

Abstract Purpose: The purpose of this study was to determine the relative roles of the sympathetic (SNS) and parasympathetic nervous system (PNS) in pupillary hippus.

Hippus, also known as pupillary athetosis, is a condition characterized by rhythmic, involuntary fluctuations in the size of the pupils. These changes occur independently of light exposure or focus …

—Hippus is a queer old word and a catchy one. It has been around a long time and refers to a restless mobility of the pupil, a tendency for the pupil size to fluctuate and to bounce up and down when you …

These spontaneous and pronounced oscillations are known as “hippus.” The amplitude of these oscillations decreases in bright light and is at its largest when the pupil is of average size and the iris …

Dec 25, 2025 · The meaning of HIPPUS is a spasmodic variation in the size of the pupil of the eye caused by a tremor of the iris.

Hippus implies the spontaneous, bilateral, rhythmic, oscillatory pupillary constriction and dilatation (frequency 10–11/minute and large diameter changes ≥1 mm) perceived by the naked eye. [1] …

Hippus definition: spasmodic contraction of the pupil of the eye.. See examples of HIPPUS used in a sentence.

Normal rhythmic variation in the size of the pupil when exposed to light is not a relative afferent pupillary defect (the pupil keeps constricting and slightly dilating several times per second when exposed to …