Related Experiment Video
Updated: Jul 30, 2026

06:59
Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
Published on: February 29, 2020
8.3K
Bilateral Congenital Persistent Pupillary Membranes: A Case Report
Yan Jing1, Bin Yuan1, Nianting Tong1
1Department of Ophthalmology Qingdao Municipal Hospital Qingdao Shandong China.
Clinical Case Reports
|July 9, 2025
Abstract:
As a remnant of the fetal tunica vasculosa lentis, persistent pupillary membranes are often an incidental finding during eye examinations. Management is conservative when asymptomatic, with intervention considered only if visual development is compromised.
Related Concept Videos
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...

