The performance of the smooth pursuit reflex and the ability to suppress the vestibulo-ocular reflex were assessed in 10 normal subjects and in patients with a variety of diseases of the central nervous system. Pursuit was measured as the maximum velocity of slow phase eye movement in response to a laser target moving sinusoidally at various frequencies up to 1 Hz and with amplitudes stepped up...

Objectives: Inferior oblique muscle overaction (IOOA) is a common ocular motility disorder. Ocular Vestibular Evoked Myogenic Potentials (oVEMP) are tests that evaluate the reflex pathway between utricular macula and inferior to detect vestibular diseases. Our study of great importance as it first in literature effect on oVEMP parameters. Methods: Thirty-five patients with unilateral (IOOA grou...

Eye movement abnormalities consisting of poor or absent smooth pursuit and vestibulo-ocular reflex suppression, gaze-paretic and rebound nystagmus, slow build-up of optokinetic nystagmus, mildly hyperactive vestibulo-ocular reflex, and a high incidence of strabismus were inherited in an autosomal dominant fashion in 10 members of a non-consanguineous English caucasian family. The onset was in e...

Progressive supranuclear palsy (PSP) has been reported as a disorder mainly characterized by tendency to fall, vertical gaze palsy, and constriction of the body axis, akinesia, cognitive impairment. Patients presenting with these typical clinical features are diagnosed having PSP-Richardson syndrome (PSP-RS). Electronystagmography (ENG) is useful for detection ocular motility disorder, which ma...

Retinoscopy could be a more effective and versatile clinical tool in observing a wide range of ocular conditions if modifications were made to overcome the inherent difficulties. In this paper, a laboratory infrared retinoscope prototype was constructed to capture the digital images of the pupil reflex of various types of eye conditions. The captured low-contrast reflex images due to intraocula...

PURPOSE To measure quantitatively the change in the coaxial fundus reflex with varying degrees of ocular misalignment. METHODS The coaxial fundus reflex was imaged with a charge coupled device camera under conditions of simulated ocular misalignment ranging from 0 degrees to 7 degrees of fixation eccentricity. The effects of refractive error and pupil size were controlled. Average gray scale ...