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Causes. Scintillating scotomas are most commonly caused by cortical spreading depression, a pattern of changes in the behavior of nerves in the brain during a migraine. Migraines, in turn, may be caused by genetic influences and hormones.
Visual snow syndrome ( VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [7] [4]
Blindness in children can be defined as a visual acuity of <3/60 in the eye with better vision of a child under 16 years of age. This generally means that the child cannot see an object 10 feet (about 3 meters) away, that another child could see if it was 200 feet (about 60 meters) away.
Closed-eye hallucination. "Visual snow" and "Seeing snow" redirect here. For the neurological condition, see Visual snow syndrome. For the display of noise in an analog video signal, see Noise (video). For the related phenomenon known as seeing stars, see Phosphene.
Streff syndrome is a vision condition primarily exhibited by children under periods of visual or emotional stress.
Visual release hallucinations, also known as Charles Bonnet syndrome or CBS, are a type of psychophysical visual disturbance in which a person with partial or severe blindness experiences visual hallucinations.
Congenital cataracts are responsible for nearly 10% of all vision loss in children worldwide. Congenital cataracts are one of the most common treatable causes of visual impairment and blindness during infancy, with an estimated prevalence of 1 to 6 cases per 10,000 live births.
Suppression is frequent in children with anisometropia or strabismus or both. For instance, children with infantile esotropia may alternate with which eye they look, each time suppressing vision in the other eye.
Visual or vision impairment ( VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment – visual impairment may cause the individual difficulties with normal daily tasks including reading and walking. [6]
CDD is a rare condition although >1,000 cases have been reported worldwide; 80-90% of the cases are female [4] While originally classified as an atypical variant of Rett syndrome, CDKL5 Deficiency Disorder (CDD) is an independent disorder and results from a pathogenic variant in a different gene (CDKL5 in CDD; MECP2 in Rett).