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Nystagmus as seen in a case of ocular albinism. The cause of pathological nystagmus may be congenital, idiopathic, or secondary to a pre-existing neurological disorder.It also may be induced temporarily by disorientation (such as on roller coaster rides or when a person has been spinning in circles) or by some drugs (alcohol, lidocaine, and other central nervous system depressants, inhalant ...
Nobuyuki Tsujii (辻井 伸行, Tsujii Nobuyuki) (also known as Nobu Tsujii) is a Japanese pianist and composer.He was born blind due to microphthalmia.Tsujii performs extensively, with a large number of conductors and orchestras, and has received critical acclaim for his unique techniques for learning music and performing with an orchestra while being unable to see.
Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes , perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause stimulates the eye.
He documented it in his 90-year-old grandfather [23] who was nearly blind from cataracts in both eyes. [7] After Bonnet's grandfather received bilateral cataract surgery, his vision evolved from slightly better to complete deterioration over time. [6] It was around this period that his visual hallucinations started. [6]
Congenitally blind people, who do not typically have visual imagery in their dreams, still move their eyes in REM sleep. [16] An alternative explanation suggests that the functional purpose of REM sleep is for procedural memory processing, and the rapid eye movement is only a side effect of the brain processing the eye-related procedural memory.
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If patients set their own schedule for sleep and wake, aligned to their endogenous non-24 period (as is the case for most sighted patients with this disorder), symptoms of insomnia and wake-time sleepiness are much reduced. However, such a schedule is incompatible with most occupations and social relationships. [citation needed]