VISUAL DEFECTS CAUSED BY OCCIPITAL LOBE LESIONS

occipital war trauma and visual field defects

seven cases of visual field defects, caused by wartrauma were seen at farabi eye hospital. none were referred by a neurologist. four patients had 20/20 visions with normal fundi. one had 12/20, in both eyes, with normal fundi. two patients presented fundus changes. the visual field defects were seen in all these seven patients. four had homonymous hemianopia, one had bilateral field restriction...

Recovery of visual-field defects after occipital lobe infarction: a perimetric study.

OBJECTIVE To assess the temporal course of homonymous visual-field defects due to occipital lobe infarction, by using automated perimetry. METHODS 32 patients with ischaemic infarction of the occipital lobe were studied prospectively, using a Humphrey Visual Field Analyser II. The visual field of each eye was divided into central, paracentral and peripheral zones. The mean visual sensitivity ...

Disorders of oculomotor function in lesions of the occipital lobe.

The Riddoch phenomenon revealed in non-occipital lobe lesions.

Riddoch (1917) described an entity which bears his name, "the Riddoch phenomenon". He observed that while patients with restricted visual fields from occipital wounds could frequently see moving objects, they could not see stationary ones in the affected fields. Riddoch divided his cases into three categories: (I) Those who perceived movement only on the affected side; (2) Those who perceived b...

Double dissociation of memory capacities after bilateral occipital-lobe or medial temporal-lobe lesions.

Memory for recently encountered information can be reflected in conscious recall and recognition of that material, or in facilitated reprocessing of that material, an effect known as repetition priming. Repetition priming may be perceptual (form-based) or conceptual (meaning-based). A patient with bilateral occipital-lobe lesions (L.H.) and a patient with bilateral medial-temporal lobe lesions ...