One of the most common conditions Dr. Wernick sees in the office is convergence insufficiency. Scientific studies show that the […]
Purpose.
Infantile Nystagmus Syndrome (INS) is an ocular motor system dysfunction characterized by the rhythmic to-and-fro oscillations of the eyes. Traditionally, the assessment of INS visual function solely focused on null- or primary-position visual acuity. Our purpose is to use the past four decades of INS research to introduce a more complete assessment of visual function in patients with INS.
Methods.
All eye-movement data were obtained using high-speed digital video, infrared reflection, or scleral search coil systems.
Results.
We have introduced four important aspects of a more complete INS visual function assessment: the eXpanded Nystagmus Acuity Function and visual acuity measurements in primary position; broadness of the eXpanded Nystagmus Acuity Function peak and high-acuity field; target acquisition time; and gaze-maintenance capability.
Conclusions.
Visual function in patients with INS is multifactorial and the simple assessment of primary position visual acuity is both inadequate and may not be the most important characteristic in overall visual function. A more complete visual function assessment should also include primary and lateral gaze eye-movement and visual acuity examinations, target acquisition time and gaze holding.
One of the most common conditions Dr. Wernick sees in the office is convergence insufficiency. Scientific studies show that the […]
Saccade eye movement is a jump eye movement. This movement involves looking at something and then looking at another thing […]
Various minor ailments and conditions can occur in our eyes and it is important to know what to do next, […]