This paper is concerned with a study of thresholds of critical flicker fusion frequency (C.F.F.) of a light stimulus in patients suffering from multiple sclerosis. The capacity of normal human vision to appreciate the intermittency of rapidly repeated light stimuli is a function of great physiological interest, and it may be impaired by disease at many sites in the visual pathway. Thus Parsons ...

OBJECTIVE To examine the anatomic distribution of gadolinium contrast medium by high-resolution surface-coil magnetic resonance imaging after peribulbar and retrobulbar injection. METHODS Comparative case series in which 4 healthy volunteers were randomized to peribulbar (n = 2) or retrobulbar (n = 2) injection of gadolinium and lidocaine hydrochloride, 2%, without epinephrine. Magnetic reson...

BACKGROUND The standard of care for penetrating keratoplasty (PKP) is either retrobulbar or peribulbar anesthesia combined with seventh cranial nerve akinesia or general anesthesia. These methods are known to be associated with rare but potentially serious adverse ocular and systemic events. PURPOSE To determine the safety and efficacy of combined topical and intracameral anesthesia in additi...

INTRODUCTION An altered perfusion of the optic nerve head has been proposed as a pathogenic factor of glaucoma. OBJECTIVE The aim of this study was to evaluate the changes of the hemodynamic parameters in the retrobulbar arterial circulation after decrease of the elevated intraocular pressure (IOP) in women and men with primary open angle glaucoma. METHODS The study included 60 patients (33...

Diagnostically as well as therapeutically, meningiomas of the so-called sphenoidal ridge present several difficulties. We therefore make a few remarks concerning the diagnostic aspects of this problem. In another paper we hope to deal with the operative treatment. In a female patient recently seen, after long deliberation, we established a diagnosis of a meningioma of the innermost part of the ...