Effect of osteopathy in the cranial field on visual function--a pilot study.

Context: The effects of osteopathy in the cranial field on visual function-particularly on changes in the visual field and on the binocular alignment of the eyes-have been poorly characterized in the literature. The authors examined whether osteopathy in the cranial field resulted in an immediate, measurable change in visual function among a sample of adults with cranial asymmetry.

Study Design: Randomized controlled double-blinded pilot clinical trial.

Topographical analysis of the optic nerve in migraine patients.

Purpose: Vascular dysfunction appears related to the development of migraines and has been associated with pressure-independent glaucoma. The purpose of this study is to investigate possible topographical differences in the optic nerve between migraine sufferers and normal age-matched control subjects. The identification of optic disc topographical differences between migraine and non-migraine sufferers may help clinicians determine if the presence of migraine influences the development and progression of glaucoma.

Maximum angle of ocular duction during visual fixation as a function of age.

Purpose: To measure and compare the maximum angle of ocular duction in healthy individuals as a function of age.

Methods: A calibrated arc perimeter was modified to display one of six randomly presented targets (high contrast Snellen equivalent letters), in both vertical (supra/infraduction) and horizontal (ab/adduction) gaze to the dominant eye of 204 healthy volunteers with best-corrected visual acuity. A bite-bar and headrest were employed to prevent head movement.

A study of pre-school vision screening tests' testability, validity and duration: do group differences matter?

Vision screening was performed on 268 pre-school children: 170 from a private pre-school, 33 from a Caribbean-American parochial pre-school and 65 pre-school children from a clinic serving indigent Spanish farm-workers. Using a multi-station format, a stereoacuity test and two visual acuity tests were performed during a single screening session. The time it took to complete a test was recorded.

Visual motion detection in patients with absent vestibular function.

Labyrinthine defective subjects (LDS) experience oscillopsia during head movements due to the absence of the vestibulo-ocular reflex (VOR). The purpose of this study was to compare horizontal and vertical visual motion detection in LDS during (i) body-stationary and (ii) horizontal whole-body oscillation conditions. Twelve LDS and controls detected the onset of drift direction of a grating that moved with accelerating velocity.