Purpose: Ocular neoplasms, both primary and metastatic, may present with visual disturbance or vision loss often are asymptomatic. Clinical examination demonstrate leukocoria, abnormal pupillary light reflex, a mass lesion without retinal detachment hemorrhage. Retinoblastoma in children uveal melanoma ocular metastases adults the most important malignant neoplasms referred for imaging to aid d...

Visual disorders are an important symptom in the migraine of developing age. Different kinds of visual disturbances can precede, accompany or follow a migraine attack. These visual disturbances can be grouped into negative (hemianopsia, quadrantopsia, scotoma) and positive (phosphene, teicopsia, metamorphopsia, macropsia, micropsia, teleopsia, diplopia, dischromatopsia, hallucination disturbanc...

background: drivers of heavy motor vehicles are occupationally exposed to intense whole body vibration (wbv) for several hours per day over their working lifetime. therefore, they are at risk of wbv-induced occupational disorders. this study aimed to investigate health effects of long-term exposure to whole body vibration among a group of heavy vehicle drivers in fars province, southwestern ira...

to facilitate a comprehensive whole population visual acuity screening, a 1-meter vision screener “e” chart was prepared to be used in the person-by-person household visual acuity examination by non-expert health workers. the chart is designed to be used in measuring visual acuity from a distance of one meter. the scaling is in terms of-log mar (logarithm of minimum angle of resolution) with a ...

This paper reviews a number of behavioral, neuropsychological and neuroimaging studies that bear on the question of whether and how visual disorders of peripheral or central origin lead to disorders of mental imagery capacity. The review of the literature suggests that in cases of blindness of peripheral origin lack of vision can progressively lead to representational disorders. However, in pat...

Assessment and management of visual disorders in children with physical and/or intellectual impairment present a complex challenge to the clinician. A comprehensive review of all aspects of vision care in multiply handicapped children is too diverse to address in a single review. This review will focus on the techniques which have been developed for visual acuity assessment in this challenging ...

A visual illusion refers to a percept that is different in some aspect from the physical stimulus. Illusions are a powerful non-invasive tool for understanding the neurobiology of vision, telling us, indirectly, how the brain processes visual stimuli. There are some neurodevelopmental disorders characterized by visual deficits. Surprisingly, just a few studies investigated illusory perception i...

Background: Childhood blindness is a major public health concern since 40% of visual disorders that can cause among children are preventable. Vision screening programs preschool have been implemented in several countries as tool for early detection and intervention disorders. In Palestine, there lack scientific data on the prevalence children. addition, vision-screening currently neither valida...