Twenty-two patients with acute optic neuritis were studied by the techniques of infrared pupillometry and visual evoked responses (VER) to pattern reversal. A relative afferent pupillary defect was found in all cases and the magnitude of this defect was found to be related to the amplitude, but not to the latency, of the VER. During follow-up the afferent defect was found to remain persistently...

A pupillographic technique, an adaptation of the swinging light test, is described for the measurement of unilateral afferent pupillary defects. In normal persons it yielded accurate, reproducible estimates of the magnitude of artificial afferent defects made with neutral filters of 1 to 4 log units density. In 15 studies on 8 patients with unilateral optic neuritis and 2 with unilateral compre...

A patient is described in whom an afferent pupillary defect was an early sign of a tumour in the pineal region. It is suggested that this was due to involvement of the pupillary afferent fibres between the optic tract and pretectal nucleus contralateral to the affected pupil.

Objective: To describe a detailed presentation and the utility of ocular imaging, both ultrasound orbital computed tomography (CT), to confirm diagnosis traumatic ONA in which megadose steroid would give no advantage. Case Presentation: A five-year-old boy came with unilateral sudden visual loss after incidentally falling his left eye struck handlebar parked bicycle. His had light perception, o...

Amblyopia is much more than decreased vision, it is a syndrome. The variety of deficits is a result of structural and functional differences in the visual pathway from the retina to the cortex. Historically, it was thought that amblyopia did not cause a relative afferent pupillary defect, but recent studies suggest otherwise. Research into the thalamic and cortical influences on the pupillary p...

purpose: to present a case of ocular toxocariasis in a young male subject from the north of iran. case report: a 29-year-old man presented to our clinic with history of decreased vision in his left eye from 10 days before. he had a history of similar symptoms 2 years ago. visual acuity in the left eye was counting fingers at 2 meters but relative afferent pupillary defect was negative. the righ...