chédiak-higashi syndrome is a rare autosomal recessive congenital immunodeficiency mainly characterized by a condition called oculo-cutaneous albinism. the affected subjects have light-colored hair, vision problems, blood clotting (coagulation) abnormalities and in adulthood varying neurologic disorders. recurrent infections, particularly viral infection with other disorders in childhood are us...

conclusions the pattern of visual impairment in learning-impaired children is not much different from that in normal children; however, because these children may not be able to express themselves clearly, lack of correct diagnosis and appropriate treatment has resulted in a marked defect in recognizing visual disorders in these children. therefore, gaining knowledge of the prevalence of refrac...

The 2010 global cost of vision loss was nearly US$3 trillion (£2 trillion) for the 733 million people living with low vision and blindness,1 with this number expected to increase significantly due to the aging population and the increasing incidence of metabolic disorders such as diabetes. This makes eye disorders one of the costliest health conditions worldwide. The major blinding disorders cu...

purpose: to describe causes of low vision and blindness in patients referred for low vision aids to rehabilitation clinics at shahid beheshti medical university during 2005. methods: visual acuity was classified to five groups based on best-corrected visual acuity (bcva) in the better eye according to world health organization (who) criteria and by using standard snellen chart which included mi...

Transcutaneous electrostimulation of optic nerves after Ye. B. Kompaneyets et al. (1985) was used in the treatment of 203 neurosurgical patients aged 5 to 65 years with vision disorders. Improvement of visual functions (vision acuity and/or visual field) was attained in 112 (55.2%) patients. No changes were observed in 91 (44.8%) patients. The authors investigated the relationship between the e...

PURPOSE To determine the causes of blindness and low vision in patients consulting a tertiary ophthalmologic center in northern Thailand. METHODS The study population included 2,951 new consecutive patients from the Department of Ophthalmology at University Hospital in Chiang-Mai, Thailand. Main outcome measures were blindness and low vision, which were defined according to World Health Organ...

Over the past 20 years, researchers have discovered over 30 separate visual areas in the cortex of the macaque monkey that exhibit specific responses to visual and environmental stimuli. Many of these areas are homologous to regions of the human visual cortex, and numerous syndromes involving these areas are described in the neurologic and ophthalmic literature. The focus of this review is the ...