AIM To evaluate the morphology of the optic nerve head in eyes with pigmentary glaucoma. METHODS Colour stereo optic disc photographs of 62 patients with pigmentary glaucoma and 566 patients with primary open angle glaucoma were morphometrically evaluated. By prestudy selection, mean visual field defect and neuroretinal rim area were not significantly different between the two groups (p = 0.8...

AIMS To determine the degree to which optical coherence tomography (OCT) can distinguish differences in retinal nerve fibre layer (RNFL) thickness between eyes with mild papilloedema, pseudopapilloedema, and normal findings. METHODS 13 patients with mild papilloedema, 11 patients with congenitally crowded optic nerves, and 17 normal subjects underwent neuro-ophthalmic examination, automated v...

Background: Measurements of optic nerve sheath diameter (ONSD) in intracranial pathologies correlate well with raised ICP. Only recently the usefulness ocular ultrasonography preeclampsia has been sought. Objective current study was measurement ONSD and compare it to healthy pregnant females.Methods: A total 90 subjects were included divided into Group I- normal pregnancy (N=30), II - mild III-...

PURPOSE To investigate the effect of optic disc center displacement on retinal nerve fiber layer (RNFL) measurement determined by spectral domain optical coherence tomography (SD-OCT). METHODS The optic disc center was manipulated at 1-pixel intervals in horizontal, vertical, and diagonal directions. According to the manipulated optic disc center location, the RNFL thickness data were resampl...

The diameter of a myelinated nerve axon is directly proportional to its conduction velocity, so the axon diameter distribution helps determine the channel capacity of nervous transmission along fascicles in the central (CNS) and peripheral nervous systems (PNS). Previously, this histological information could only be obtained using invasive tissue biopsies. Here we propose a new NMR-based appro...

INTRODUCTION Elevated intracranial pressure (ICP) is a major and potentially lethal disorder in patients admitted to the emergency department (ED). Several methods are being used to investigate for elevated ICP. Here we assessed and compared the diagnostic accuracy of two existing tools of ophthalmoscopy and optic nerve ultrasonography in detection of elevated ICP. METHODS 131 participants wi...

Introduction Raised intracranial pressure (ICP) can cause secondary brain injury, which is associated with severe disability and mortality [1]. Invasive ICP monitoring has been linked to increased mortality [2]. Sekhon, et al. [3] demonstrated a strong correlation between optic nerve sheath diameter (ONSD) on CT scan and ICP, with the potential to use this non-invasive method to detect raised ICP.

Harvey JP. BMJ Case Rep 2017. doi:10.1136/bcr-2017-220343 Description A 19-year-old man was incidentally noted to have a bitemporal heteronymous hemianopia on automated perimetry during his first optician’s sight test (figure 1). The patient reported life-long reduced vision in the right eye although this was his first presentation to ophthalmic services. The patient was induced at 34 weeks due...

Introduction  Intracranial pressure (ICP) monitoring is a vital element in the diagnosis and management of several neurological disorders, such as head injury, hydrocephalus, subarachnoid hemorrhage, intracranial hematoma.  The optic nerve sheath direct contact with space. This relationship provides physiological foundation for using to assess pressure. Since loosely attached nerve, space thi...