Related Experiment Video
Updated: May 16, 2026

06:09
Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition
Published on: August 18, 2023
Bilateral Morning Glory Optic Disc Anomaly ASsociated with Asymmetry of Right and Left Optic Nerve Sheath Complexes
Binocular Vision & Strabology Quarterly, Simms-Romano'S
|December 14, 2012
Abstract:
A female child with morning glory disc anomaly (MGDA) in two eyes is described in this report. The patient had no systemic abnormalities. Magnetic resonance imaging of the cranium, sella and orbits revealed an asymmetry of the right and left optic nerve sheath complexes. The presence of asymmetric optic nerve sheath complexes in patients with bilateral MGDA has not been previously reported.
Related Concept Videos
Anatomy of the Eyeball
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
