incongruent nystagmus - meaning and definition. What is incongruent nystagmus
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What (who) is incongruent nystagmus - definition

WHEN A SOLID SUBSTANCE DOES NOT MELT UNIFORMLY
Incongruent Melting

Amaurotic nystagmus         
THE NYSTAGMUS ASSOCIATED WITH BLINDNESS OR THE CENTRAL VISION DEFECTS.
Visual Deprivation Nystagmus; Amblyopic Nystagmus
Amaurotic nystagmus is defined as the nystagmus associated with blindness or the central vision defects. It is characterized by the pendular or jerky movements of the eyes in the patients who have visual impairment for a long period of time.
Pendular nystagmus         
A SINUSOIDAL OSCILLATION, WHICH REFERS TO THE WAVEFORM OF INVOLUNTARY EYE MOVEMENTS THAT MAY OCCUR IN ANY DIRECTION.
Acquired pendular nystagmus
Pendular nystagmus is a sinusoidal oscillation, which refers to the waveform of involuntary eye movements that may occur in any direction. It is characterized by the multidimensional slow eye movements of the eyes (1 Hz frequency) with an equal velocity in each direction that resembles the trajectory of a pendulum.
Nystagmus         
  • Fast-phase horizontal eye movement vision
  • A diagram of the [[caloric reflex test]], which tests the [[vestibulo-ocular reflex]] (VOR) by irrigating the ear canal with warm or cold water to induce physiological nystagmus.
  • Example of congenital (early onset) nystagmus
  • Fast-phase vertical eye movement vision
CONDITION OF INVOLUNTARY EYE MOVEMENT
Pathologic nystagmus; Nystagmus, pathologic; Nystagmus, congenital; Nystagmus, physiologic; Nystagmus, optokinetic; Physiologic nystagmus; Nostagmus; Nystagmic; Horizontal gaze nystagmus test; Central positional nystagmus; Jerk nystagmus; Right-beating nystagmus; Left-beating nystagmus; Central nystagmus; Infantile nystagmus; Periodic alternating nystagmus; Rotatory nystagmus; Horizontal gaze nystagmus; Nestagmus; Involuntary eye movement; Congenital nystagmus
·noun A rapid involuntary oscillation of the eyeballs.

Wikipedia

Incongruent melting

Incongruent melting occurs when a solid substance does not melt uniformly, so that the chemical composition of the resulting liquid is not the same as that of the original solid. During incongruent melting a new solid of different composition forms. For example, melting of orthoclase (KAlSi3O8) produces leucite (KAlSi2O6) in addition to a melt. The melt produced is richer in silica (SiO2). The proportions of leucite and melt created can be recombined to yield the bulk composition of the starting feldspar. Another mineral that can melt incongruently is enstatite (Mg2Si2O6), which produces forsterite (Mg2SiO4) in addition to a melt richer in SiO2 when melting at low pressure. Enstatite melts congruently at higher pressures between 2.5 and 5.5 kilobars.